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Finding the Fourth Proportional to 99,861.72, 137,808.46 and 54,539.70

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Solution

The fourth proportional to 99,861.72, 137,808.46 and 54,539.70 is: 75,264.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,861.72 : 137,808.46 = 54,539.70 : x
  2. Step 2: Convert to fraction form
    99,861.72/137,808.46 = 54,539.70/x
  3. Step 3: Cross multiply
    99,861.72x = 137,808.46 × 54,539.70
  4. Step 4: Simplify right side
    99,861.72x = 7,516,032,065.86
  5. Step 5: Solve for x
    x = 7,516,032,065.86/99,861.72
  6. Step 6: Final answer
    x = 75,264.40

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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.