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Finding the Fourth Proportional to 72,160.86, 99,581.66 and 40,329.74

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Solution

The fourth proportional to 72,160.86, 99,581.66 and 40,329.74 is: 55,654.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,160.86 : 99,581.66 = 40,329.74 : x
  2. Step 2: Convert to fraction form
    72,160.86/99,581.66 = 40,329.74/x
  3. Step 3: Cross multiply
    72,160.86x = 99,581.66 × 40,329.74
  4. Step 4: Simplify right side
    72,160.86x = 4,016,102,456.57
  5. Step 5: Solve for x
    x = 4,016,102,456.57/72,160.86
  6. Step 6: Final answer
    x = 55,654.86

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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.