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Finding the Fourth Proportional to 85,494.99, 128,242.45 and 23,165.49

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Solution

The fourth proportional to 85,494.99, 128,242.45 and 23,165.49 is: 34,748.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,494.99 : 128,242.45 = 23,165.49 : x
  2. Step 2: Convert to fraction form
    85,494.99/128,242.45 = 23,165.49/x
  3. Step 3: Cross multiply
    85,494.99x = 128,242.45 × 23,165.49
  4. Step 4: Simplify right side
    85,494.99x = 2,970,799,193.05
  5. Step 5: Solve for x
    x = 2,970,799,193.05/85,494.99
  6. Step 6: Final answer
    x = 34,748.23

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.