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Finding the Fourth Proportional to 72,294.47, 108,431.00 and 27,915.69

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Solution

The fourth proportional to 72,294.47, 108,431.00 and 27,915.69 is: 41,869.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,294.47 : 108,431.00 = 27,915.69 : x
  2. Step 2: Convert to fraction form
    72,294.47/108,431.00 = 27,915.69/x
  3. Step 3: Cross multiply
    72,294.47x = 108,431.00 × 27,915.69
  4. Step 4: Simplify right side
    72,294.47x = 3,026,926,101.21
  5. Step 5: Solve for x
    x = 3,026,926,101.21/72,294.47
  6. Step 6: Final answer
    x = 41,869.40

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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.