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Finding the Fourth Proportional to 99,861.31, 137,809.65 and 54,540.60

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Solution

The fourth proportional to 99,861.31, 137,809.65 and 54,540.60 is: 75,266.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,861.31 : 137,809.65 = 54,540.60 : x
  2. Step 2: Convert to fraction form
    99,861.31/137,809.65 = 54,540.60/x
  3. Step 3: Cross multiply
    99,861.31x = 137,809.65 × 54,540.60
  4. Step 4: Simplify right side
    99,861.31x = 7,516,220,996.79
  5. Step 5: Solve for x
    x = 7,516,220,996.79/99,861.31
  6. Step 6: Final answer
    x = 75,266.60

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1.5x scale

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.