Home / 136,137.39-187,854.17-78,767.79

Finding the Fourth Proportional to 136,137.39, 187,854.17 and 78,767.79

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Solution

The fourth proportional to 136,137.39, 187,854.17 and 78,767.79 is: 108,690.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,137.39 : 187,854.17 = 78,767.79 : x
  2. Step 2: Convert to fraction form
    136,137.39/187,854.17 = 78,767.79/x
  3. Step 3: Cross multiply
    136,137.39x = 187,854.17 × 78,767.79
  4. Step 4: Simplify right side
    136,137.39x = 14,796,857,419.35
  5. Step 5: Solve for x
    x = 14,796,857,419.35/136,137.39
  6. Step 6: Final answer
    x = 108,690.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.