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Finding the Fourth Proportional to 72,874.70, 100,574.24 and 42,658.20

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Solution

The fourth proportional to 72,874.70, 100,574.24 and 42,658.20 is: 58,872.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,874.70 : 100,574.24 = 42,658.20 : x
  2. Step 2: Convert to fraction form
    72,874.70/100,574.24 = 42,658.20/x
  3. Step 3: Cross multiply
    72,874.70x = 100,574.24 × 42,658.20
  4. Step 4: Simplify right side
    72,874.70x = 4,290,316,044.77
  5. Step 5: Solve for x
    x = 4,290,316,044.77/72,874.70
  6. Step 6: Final answer
    x = 58,872.50

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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.