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Finding the Fourth Proportional to 72,712.77, 100,310.82 and 42,484.50

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Solution

The fourth proportional to 72,712.77, 100,310.82 and 42,484.50 is: 58,609.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,712.77 : 100,310.82 = 42,484.50 : x
  2. Step 2: Convert to fraction form
    72,712.77/100,310.82 = 42,484.50/x
  3. Step 3: Cross multiply
    72,712.77x = 100,310.82 × 42,484.50
  4. Step 4: Simplify right side
    72,712.77x = 4,261,654,872.97
  5. Step 5: Solve for x
    x = 4,261,654,872.97/72,712.77
  6. Step 6: Final answer
    x = 58,609.44

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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.