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Finding the Fourth Proportional to 72,516.70, 100,073.80 and 40,251.92

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Solution

The fourth proportional to 72,516.70, 100,073.80 and 40,251.92 is: 55,548.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,516.70 : 100,073.80 = 40,251.92 : x
  2. Step 2: Convert to fraction form
    72,516.70/100,073.80 = 40,251.92/x
  3. Step 3: Cross multiply
    72,516.70x = 100,073.80 × 40,251.92
  4. Step 4: Simplify right side
    72,516.70x = 4,028,162,591.70
  5. Step 5: Solve for x
    x = 4,028,162,591.70/72,516.70
  6. Step 6: Final answer
    x = 55,548.07

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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.