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Finding the Fourth Proportional to 131,425.40, 197,186.70 and 126,565.40

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Solution

The fourth proportional to 131,425.40, 197,186.70 and 126,565.40 is: 189,894.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,425.40 : 197,186.70 = 126,565.40 : x
  2. Step 2: Convert to fraction form
    131,425.40/197,186.70 = 126,565.40/x
  3. Step 3: Cross multiply
    131,425.40x = 197,186.70 × 126,565.40
  4. Step 4: Simplify right side
    131,425.40x = 24,957,013,560.18
  5. Step 5: Solve for x
    x = 24,957,013,560.18/131,425.40
  6. Step 6: Final answer
    x = 189,894.90

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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.