Home / 129,194.91-178,303.76-71,839.95

Finding the Fourth Proportional to 129,194.91, 178,303.76 and 71,839.95

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Solution

The fourth proportional to 129,194.91, 178,303.76 and 71,839.95 is: 99,147.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,194.91 : 178,303.76 = 71,839.95 : x
  2. Step 2: Convert to fraction form
    129,194.91/178,303.76 = 71,839.95/x
  3. Step 3: Cross multiply
    129,194.91x = 178,303.76 × 71,839.95
  4. Step 4: Simplify right side
    129,194.91x = 12,809,332,844.01
  5. Step 5: Solve for x
    x = 12,809,332,844.01/129,194.91
  6. Step 6: Final answer
    x = 99,147.35

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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.