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Finding the Fourth Proportional to 85,778.48, 128,663.60 and 23,449.12

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Solution

The fourth proportional to 85,778.48, 128,663.60 and 23,449.12 is: 35,172.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,778.48 : 128,663.60 = 23,449.12 : x
  2. Step 2: Convert to fraction form
    85,778.48/128,663.60 = 23,449.12/x
  3. Step 3: Cross multiply
    85,778.48x = 128,663.60 × 23,449.12
  4. Step 4: Simplify right side
    85,778.48x = 3,017,048,196.03
  5. Step 5: Solve for x
    x = 3,017,048,196.03/85,778.48
  6. Step 6: Final answer
    x = 35,172.55

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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.