Home / 87,931.20-131,648.40-68,437.20

Finding the Fourth Proportional to 87,931.20, 131,648.40 and 68,437.20

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Solution

The fourth proportional to 87,931.20, 131,648.40 and 68,437.20 is: 102,462.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,931.20 : 131,648.40 = 68,437.20 : x
  2. Step 2: Convert to fraction form
    87,931.20/131,648.40 = 68,437.20/x
  3. Step 3: Cross multiply
    87,931.20x = 131,648.40 × 68,437.20
  4. Step 4: Simplify right side
    87,931.20x = 9,009,647,880.48
  5. Step 5: Solve for x
    x = 9,009,647,880.48/87,931.20
  6. Step 6: Final answer
    x = 102,462.47

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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.