Home / 81,306.22-121,801.52-59,920.10

Finding the Fourth Proportional to 81,306.22, 121,801.52 and 59,920.10

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Solution

The fourth proportional to 81,306.22, 121,801.52 and 59,920.10 is: 89,763.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,306.22 : 121,801.52 = 59,920.10 : x
  2. Step 2: Convert to fraction form
    81,306.22/121,801.52 = 59,920.10/x
  3. Step 3: Cross multiply
    81,306.22x = 121,801.52 × 59,920.10
  4. Step 4: Simplify right side
    81,306.22x = 7,298,359,258.55
  5. Step 5: Solve for x
    x = 7,298,359,258.55/81,306.22
  6. Step 6: Final answer
    x = 89,763.85

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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.