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Finding the Fourth Proportional to 67,294.74, 92,862.28 and 40,421.28

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Solution

The fourth proportional to 67,294.74, 92,862.28 and 40,421.28 is: 55,778.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,294.74 : 92,862.28 = 40,421.28 : x
  2. Step 2: Convert to fraction form
    67,294.74/92,862.28 = 40,421.28/x
  3. Step 3: Cross multiply
    67,294.74x = 92,862.28 × 40,421.28
  4. Step 4: Simplify right side
    67,294.74x = 3,753,612,221.32
  5. Step 5: Solve for x
    x = 3,753,612,221.32/67,294.74
  6. Step 6: Final answer
    x = 55,778.69

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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.