Home / 72,215.91-99,656.08-39,951.72

Finding the Fourth Proportional to 72,215.91, 99,656.08 and 39,951.72

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Solution

The fourth proportional to 72,215.91, 99,656.08 and 39,951.72 is: 55,132.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,215.91 : 99,656.08 = 39,951.72 : x
  2. Step 2: Convert to fraction form
    72,215.91/99,656.08 = 39,951.72/x
  3. Step 3: Cross multiply
    72,215.91x = 99,656.08 × 39,951.72
  4. Step 4: Simplify right side
    72,215.91x = 3,981,431,330.87
  5. Step 5: Solve for x
    x = 3,981,431,330.87/72,215.91
  6. Step 6: Final answer
    x = 55,132.33

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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.