Home / 87,628.60-131,540.10-54,386.20

Finding the Fourth Proportional to 87,628.60, 131,540.10 and 54,386.20

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Solution

The fourth proportional to 87,628.60, 131,540.10 and 54,386.20 is: 81,639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,628.60 : 131,540.10 = 54,386.20 : x
  2. Step 2: Convert to fraction form
    87,628.60/131,540.10 = 54,386.20/x
  3. Step 3: Cross multiply
    87,628.60x = 131,540.10 × 54,386.20
  4. Step 4: Simplify right side
    87,628.60x = 7,153,966,186.62
  5. Step 5: Solve for x
    x = 7,153,966,186.62/87,628.60
  6. Step 6: Final answer
    x = 81,639.63

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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.