Home / 129,296.40-178,453.61-80,920.82

Finding the Fourth Proportional to 129,296.40, 178,453.61 and 80,920.82

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Solution

The fourth proportional to 129,296.40, 178,453.61 and 80,920.82 is: 111,686.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,296.40 : 178,453.61 = 80,920.82 : x
  2. Step 2: Convert to fraction form
    129,296.40/178,453.61 = 80,920.82/x
  3. Step 3: Cross multiply
    129,296.40x = 178,453.61 × 80,920.82
  4. Step 4: Simplify right side
    129,296.40x = 14,440,612,570.55
  5. Step 5: Solve for x
    x = 14,440,612,570.55/129,296.40
  6. Step 6: Final answer
    x = 111,686.11

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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.