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Finding the Fourth Proportional to 131,793.40, 197,821.32 and 72,656.92

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Solution

The fourth proportional to 131,793.40, 197,821.32 and 72,656.92 is: 109,057.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,793.40 : 197,821.32 = 72,656.92 : x
  2. Step 2: Convert to fraction form
    131,793.40/197,821.32 = 72,656.92/x
  3. Step 3: Cross multiply
    131,793.40x = 197,821.32 × 72,656.92
  4. Step 4: Simplify right side
    131,793.40x = 14,373,087,821.53
  5. Step 5: Solve for x
    x = 14,373,087,821.53/131,793.40
  6. Step 6: Final answer
    x = 109,057.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.