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Finding the Fourth Proportional to 57,385.61, 86,092.29 and 19,940.25

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Solution

The fourth proportional to 57,385.61, 86,092.29 and 19,940.25 is: 29,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,385.61 : 86,092.29 = 19,940.25 : x
  2. Step 2: Convert to fraction form
    57,385.61/86,092.29 = 19,940.25/x
  3. Step 3: Cross multiply
    57,385.61x = 86,092.29 × 19,940.25
  4. Step 4: Simplify right side
    57,385.61x = 1,716,701,785.67
  5. Step 5: Solve for x
    x = 1,716,701,785.67/57,385.61
  6. Step 6: Final answer
    x = 29,915.20

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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.