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Finding the Fourth Proportional to 87,049.60, 130,228.80 and 75,491.20

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Solution

The fourth proportional to 87,049.60, 130,228.80 and 75,491.20 is: 112,937.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,049.60 : 130,228.80 = 75,491.20 : x
  2. Step 2: Convert to fraction form
    87,049.60/130,228.80 = 75,491.20/x
  3. Step 3: Cross multiply
    87,049.60x = 130,228.80 × 75,491.20
  4. Step 4: Simplify right side
    87,049.60x = 9,831,128,386.56
  5. Step 5: Solve for x
    x = 9,831,128,386.56/87,049.60
  6. Step 6: Final answer
    x = 112,937.09

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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.