Home / 87,928.66-121,342.10-47,642.72

Finding the Fourth Proportional to 87,928.66, 121,342.10 and 47,642.72

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Solution

The fourth proportional to 87,928.66, 121,342.10 and 47,642.72 is: 65,747.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,928.66 : 121,342.10 = 47,642.72 : x
  2. Step 2: Convert to fraction form
    87,928.66/121,342.10 = 47,642.72/x
  3. Step 3: Cross multiply
    87,928.66x = 121,342.10 × 47,642.72
  4. Step 4: Simplify right side
    87,928.66x = 5,781,067,117.58
  5. Step 5: Solve for x
    x = 5,781,067,117.58/87,928.66
  6. Step 6: Final answer
    x = 65,747.25

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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.