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Finding the Fourth Proportional to 129,323.58, 178,491.11 and 80,947.95

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Solution

The fourth proportional to 129,323.58, 178,491.11 and 80,947.95 is: 111,723.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,323.58 : 178,491.11 = 80,947.95 : x
  2. Step 2: Convert to fraction form
    129,323.58/178,491.11 = 80,947.95/x
  3. Step 3: Cross multiply
    129,323.58x = 178,491.11 × 80,947.95
  4. Step 4: Simplify right side
    129,323.58x = 14,448,489,042.98
  5. Step 5: Solve for x
    x = 14,448,489,042.98/129,323.58
  6. Step 6: Final answer
    x = 111,723.55

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1.5x scale

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.