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Finding the Fourth Proportional to 72,732.34, 100,372 and 42,520.24

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Solution

The fourth proportional to 72,732.34, 100,372 and 42,520.24 is: 58,678.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,732.34 : 100,372 = 42,520.24 : x
  2. Step 2: Convert to fraction form
    72,732.34/100,372 = 42,520.24/x
  3. Step 3: Cross multiply
    72,732.34x = 100,372 × 42,520.24
  4. Step 4: Simplify right side
    72,732.34x = 4,267,841,529.28
  5. Step 5: Solve for x
    x = 4,267,841,529.28/72,732.34
  6. Step 6: Final answer
    x = 58,678.73

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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.