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Finding the Fourth Proportional to 85,905.19, 118,549.80 and 47,142.74

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Solution

The fourth proportional to 85,905.19, 118,549.80 and 47,142.74 is: 65,057.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,905.19 : 118,549.80 = 47,142.74 : x
  2. Step 2: Convert to fraction form
    85,905.19/118,549.80 = 47,142.74/x
  3. Step 3: Cross multiply
    85,905.19x = 118,549.80 × 47,142.74
  4. Step 4: Simplify right side
    85,905.19x = 5,588,762,398.45
  5. Step 5: Solve for x
    x = 5,588,762,398.45/85,905.19
  6. Step 6: Final answer
    x = 65,057.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.