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Finding the Fourth Proportional to 131,472.80, 197,209.20 and 123,696.80

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Solution

The fourth proportional to 131,472.80, 197,209.20 and 123,696.80 is: 185,545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,472.80 : 197,209.20 = 123,696.80 : x
  2. Step 2: Convert to fraction form
    131,472.80/197,209.20 = 123,696.80/x
  3. Step 3: Cross multiply
    131,472.80x = 197,209.20 × 123,696.80
  4. Step 4: Simplify right side
    131,472.80x = 24,394,146,970.56
  5. Step 5: Solve for x
    x = 24,394,146,970.56/131,472.80
  6. Step 6: Final answer
    x = 185,545.20

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1.5x scale

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.