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Finding the Fourth Proportional to 74,355.80, 102,609.28 and 42,522.80

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Solution

The fourth proportional to 74,355.80, 102,609.28 and 42,522.80 is: 58,680.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,355.80 : 102,609.28 = 42,522.80 : x
  2. Step 2: Convert to fraction form
    74,355.80/102,609.28 = 42,522.80/x
  3. Step 3: Cross multiply
    74,355.80x = 102,609.28 × 42,522.80
  4. Step 4: Simplify right side
    74,355.80x = 4,363,233,891.58
  5. Step 5: Solve for x
    x = 4,363,233,891.58/74,355.80
  6. Step 6: Final answer
    x = 58,680.48

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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.