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Finding the Fourth Proportional to 137,411.20, 206,116.80 and 42,641.20

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Solution

The fourth proportional to 137,411.20, 206,116.80 and 42,641.20 is: 63,961.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,411.20 : 206,116.80 = 42,641.20 : x
  2. Step 2: Convert to fraction form
    137,411.20/206,116.80 = 42,641.20/x
  3. Step 3: Cross multiply
    137,411.20x = 206,116.80 × 42,641.20
  4. Step 4: Simplify right side
    137,411.20x = 8,789,067,692.16
  5. Step 5: Solve for x
    x = 8,789,067,692.16/137,411.20
  6. Step 6: Final answer
    x = 63,961.80

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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.