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Finding the Fourth Proportional to 71,641.80, 107,316.90 and 36,601.20

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Solution

The fourth proportional to 71,641.80, 107,316.90 and 36,601.20 is: 54,827.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,641.80 : 107,316.90 = 36,601.20 : x
  2. Step 2: Convert to fraction form
    71,641.80/107,316.90 = 36,601.20/x
  3. Step 3: Cross multiply
    71,641.80x = 107,316.90 × 36,601.20
  4. Step 4: Simplify right side
    71,641.80x = 3,927,927,320.28
  5. Step 5: Solve for x
    x = 3,927,927,320.28/71,641.80
  6. Step 6: Final answer
    x = 54,827.31

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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.