Home / 81,371.52-121,890.96-60,335.28

Finding the Fourth Proportional to 81,371.52, 121,890.96 and 60,335.28

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Solution

The fourth proportional to 81,371.52, 121,890.96 and 60,335.28 is: 90,379.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,371.52 : 121,890.96 = 60,335.28 : x
  2. Step 2: Convert to fraction form
    81,371.52/121,890.96 = 60,335.28/x
  3. Step 3: Cross multiply
    81,371.52x = 121,890.96 × 60,335.28
  4. Step 4: Simplify right side
    81,371.52x = 7,354,325,201.07
  5. Step 5: Solve for x
    x = 7,354,325,201.07/81,371.52
  6. Step 6: Final answer
    x = 90,379.60

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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.