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Finding the Fourth Proportional to 72,658.28, 100,265.20 and 42,446.40

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Solution

The fourth proportional to 72,658.28, 100,265.20 and 42,446.40 is: 58,574.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,658.28 : 100,265.20 = 42,446.40 : x
  2. Step 2: Convert to fraction form
    72,658.28/100,265.20 = 42,446.40/x
  3. Step 3: Cross multiply
    72,658.28x = 100,265.20 × 42,446.40
  4. Step 4: Simplify right side
    72,658.28x = 4,255,896,785.28
  5. Step 5: Solve for x
    x = 4,255,896,785.28/72,658.28
  6. Step 6: Final answer
    x = 58,574.15

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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.