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Finding the Fourth Proportional to 136,479.71, 188,340.07 and 76,052.90

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Solution

The fourth proportional to 136,479.71, 188,340.07 and 76,052.90 is: 104,951.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,479.71 : 188,340.07 = 76,052.90 : x
  2. Step 2: Convert to fraction form
    136,479.71/188,340.07 = 76,052.90/x
  3. Step 3: Cross multiply
    136,479.71x = 188,340.07 × 76,052.90
  4. Step 4: Simplify right side
    136,479.71x = 14,323,808,509.70
  5. Step 5: Solve for x
    x = 14,323,808,509.70/136,479.71
  6. Step 6: Final answer
    x = 104,951.93

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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.