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Finding the Fourth Proportional to 86,576.40, 129,864.60 and 79,359.30

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Solution

The fourth proportional to 86,576.40, 129,864.60 and 79,359.30 is: 119,038.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,576.40 : 129,864.60 = 79,359.30 : x
  2. Step 2: Convert to fraction form
    86,576.40/129,864.60 = 79,359.30/x
  3. Step 3: Cross multiply
    86,576.40x = 129,864.60 × 79,359.30
  4. Step 4: Simplify right side
    86,576.40x = 10,305,963,750.78
  5. Step 5: Solve for x
    x = 10,305,963,750.78/86,576.40
  6. Step 6: Final answer
    x = 119,038.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.