Home / 80,999.10-121,498.65-72,243.90

Finding the Fourth Proportional to 80,999.10, 121,498.65 and 72,243.90

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Solution

The fourth proportional to 80,999.10, 121,498.65 and 72,243.90 is: 108,365.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,999.10 : 121,498.65 = 72,243.90 : x
  2. Step 2: Convert to fraction form
    80,999.10/121,498.65 = 72,243.90/x
  3. Step 3: Cross multiply
    80,999.10x = 121,498.65 × 72,243.90
  4. Step 4: Simplify right side
    80,999.10x = 8,777,536,320.74
  5. Step 5: Solve for x
    x = 8,777,536,320.74/80,999.10
  6. Step 6: Final answer
    x = 108,365.85

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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.