Home / 230,139.20-317,562.72-129,517.76

Finding the Fourth Proportional to 230,139.20, 317,562.72 and 129,517.76

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Solution

The fourth proportional to 230,139.20, 317,562.72 and 129,517.76 is: 178,717.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,139.20 : 317,562.72 = 129,517.76 : x
  2. Step 2: Convert to fraction form
    230,139.20/317,562.72 = 129,517.76/x
  3. Step 3: Cross multiply
    230,139.20x = 317,562.72 × 129,517.76
  4. Step 4: Simplify right side
    230,139.20x = 41,130,012,153.91
  5. Step 5: Solve for x
    x = 41,130,012,153.91/230,139.20
  6. Step 6: Final answer
    x = 178,717.98

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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.