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Finding the Fourth Proportional to 72,864.80, 101,011.98 and 68,873.53

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Solution

The fourth proportional to 72,864.80, 101,011.98 and 68,873.53 is: 95,478.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,864.80 : 101,011.98 = 68,873.53 : x
  2. Step 2: Convert to fraction form
    72,864.80/101,011.98 = 68,873.53/x
  3. Step 3: Cross multiply
    72,864.80x = 101,011.98 × 68,873.53
  4. Step 4: Simplify right side
    72,864.80x = 6,957,050,785.46
  5. Step 5: Solve for x
    x = 6,957,050,785.46/72,864.80
  6. Step 6: Final answer
    x = 95,478.90

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.