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Finding the Fourth Proportional to 57,502.80, 86,256.90 and 18,061.20

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Solution

The fourth proportional to 57,502.80, 86,256.90 and 18,061.20 is: 27,092.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,502.80 : 86,256.90 = 18,061.20 : x
  2. Step 2: Convert to fraction form
    57,502.80/86,256.90 = 18,061.20/x
  3. Step 3: Cross multiply
    57,502.80x = 86,256.90 × 18,061.20
  4. Step 4: Simplify right side
    57,502.80x = 1,557,903,122.28
  5. Step 5: Solve for x
    x = 1,557,903,122.28/57,502.80
  6. Step 6: Final answer
    x = 27,092.65

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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.