Home / 87,948.06-121,380.57-65,356.35

Finding the Fourth Proportional to 87,948.06, 121,380.57 and 65,356.35

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Solution

The fourth proportional to 87,948.06, 121,380.57 and 65,356.35 is: 90,200.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,948.06 : 121,380.57 = 65,356.35 : x
  2. Step 2: Convert to fraction form
    87,948.06/121,380.57 = 65,356.35/x
  3. Step 3: Cross multiply
    87,948.06x = 121,380.57 × 65,356.35
  4. Step 4: Simplify right side
    87,948.06x = 7,932,991,016.12
  5. Step 5: Solve for x
    x = 7,932,991,016.12/87,948.06
  6. Step 6: Final answer
    x = 90,200.86

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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.