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Finding the Fourth Proportional to 131,862.60, 197,648.10 and 72,740.70

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Solution

The fourth proportional to 131,862.60, 197,648.10 and 72,740.70 is: 109,030.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,862.60 : 197,648.10 = 72,740.70 : x
  2. Step 2: Convert to fraction form
    131,862.60/197,648.10 = 72,740.70/x
  3. Step 3: Cross multiply
    131,862.60x = 197,648.10 × 72,740.70
  4. Step 4: Simplify right side
    131,862.60x = 14,377,061,147.67
  5. Step 5: Solve for x
    x = 14,377,061,147.67/131,862.60
  6. Step 6: Final answer
    x = 109,030.62

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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.