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Finding the Fourth Proportional to 72,616.70, 100,201.76 and 42,380.11

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Solution

The fourth proportional to 72,616.70, 100,201.76 and 42,380.11 is: 58,479.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,616.70 : 100,201.76 = 42,380.11 : x
  2. Step 2: Convert to fraction form
    72,616.70/100,201.76 = 42,380.11/x
  3. Step 3: Cross multiply
    72,616.70x = 100,201.76 × 42,380.11
  4. Step 4: Simplify right side
    72,616.70x = 4,246,561,683.27
  5. Step 5: Solve for x
    x = 4,246,561,683.27/72,616.70
  6. Step 6: Final answer
    x = 58,479.13

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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.