Home / 87,691.56-121,014.60-55,853.64

Finding the Fourth Proportional to 87,691.56, 121,014.60 and 55,853.64

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Solution

The fourth proportional to 87,691.56, 121,014.60 and 55,853.64 is: 77,078.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,691.56 : 121,014.60 = 55,853.64 : x
  2. Step 2: Convert to fraction form
    87,691.56/121,014.60 = 55,853.64/x
  3. Step 3: Cross multiply
    87,691.56x = 121,014.60 × 55,853.64
  4. Step 4: Simplify right side
    87,691.56x = 6,759,105,903.14
  5. Step 5: Solve for x
    x = 6,759,105,903.14/87,691.56
  6. Step 6: Final answer
    x = 77,078.18

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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.