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Finding the Fourth Proportional to 136,950.32, 188,920.68 and 86,678.48

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Solution

The fourth proportional to 136,950.32, 188,920.68 and 86,678.48 is: 119,571.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,950.32 : 188,920.68 = 86,678.48 : x
  2. Step 2: Convert to fraction form
    136,950.32/188,920.68 = 86,678.48/x
  3. Step 3: Cross multiply
    136,950.32x = 188,920.68 × 86,678.48
  4. Step 4: Simplify right side
    136,950.32x = 16,375,357,382.97
  5. Step 5: Solve for x
    x = 16,375,357,382.97/136,950.32
  6. Step 6: Final answer
    x = 119,571.52

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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.