Home / 87,988.28-121,260.88-62,495.72

Finding the Fourth Proportional to 87,988.28, 121,260.88 and 62,495.72

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Solution

The fourth proportional to 87,988.28, 121,260.88 and 62,495.72 is: 86,128.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,988.28 : 121,260.88 = 62,495.72 : x
  2. Step 2: Convert to fraction form
    87,988.28/121,260.88 = 62,495.72/x
  3. Step 3: Cross multiply
    87,988.28x = 121,260.88 × 62,495.72
  4. Step 4: Simplify right side
    87,988.28x = 7,578,286,003.43
  5. Step 5: Solve for x
    x = 7,578,286,003.43/87,988.28
  6. Step 6: Final answer
    x = 86,128.36

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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.