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Finding the Fourth Proportional to 136,953.80, 205,737.90 and 131,731.40

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Solution

The fourth proportional to 136,953.80, 205,737.90 and 131,731.40 is: 197,892.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,953.80 : 205,737.90 = 131,731.40 : x
  2. Step 2: Convert to fraction form
    136,953.80/205,737.90 = 131,731.40/x
  3. Step 3: Cross multiply
    136,953.80x = 205,737.90 × 131,731.40
  4. Step 4: Simplify right side
    136,953.80x = 27,102,141,600.06
  5. Step 5: Solve for x
    x = 27,102,141,600.06/136,953.80
  6. Step 6: Final answer
    x = 197,892.59

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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.