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Finding the Fourth Proportional to 74,862.70, 112,294.05 and 30,521.28

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Solution

The fourth proportional to 74,862.70, 112,294.05 and 30,521.28 is: 45,781.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,862.70 : 112,294.05 = 30,521.28 : x
  2. Step 2: Convert to fraction form
    74,862.70/112,294.05 = 30,521.28/x
  3. Step 3: Cross multiply
    74,862.70x = 112,294.05 × 30,521.28
  4. Step 4: Simplify right side
    74,862.70x = 3,427,357,580.91
  5. Step 5: Solve for x
    x = 3,427,357,580.91/74,862.70
  6. Step 6: Final answer
    x = 45,781.91

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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.