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Finding the Fourth Proportional to 131,810.80, 197,447.40 and 81,737.20

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Solution

The fourth proportional to 131,810.80, 197,447.40 and 81,737.20 is: 122,439.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,810.80 : 197,447.40 = 81,737.20 : x
  2. Step 2: Convert to fraction form
    131,810.80/197,447.40 = 81,737.20/x
  3. Step 3: Cross multiply
    131,810.80x = 197,447.40 × 81,737.20
  4. Step 4: Simplify right side
    131,810.80x = 16,138,797,623.28
  5. Step 5: Solve for x
    x = 16,138,797,623.28/131,810.80
  6. Step 6: Final answer
    x = 122,439.11

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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.