Home / 81,965.10-122,947.65-73,209.90

Finding the Fourth Proportional to 81,965.10, 122,947.65 and 73,209.90

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Solution

The fourth proportional to 81,965.10, 122,947.65 and 73,209.90 is: 109,814.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,965.10 : 122,947.65 = 73,209.90 : x
  2. Step 2: Convert to fraction form
    81,965.10/122,947.65 = 73,209.90/x
  3. Step 3: Cross multiply
    81,965.10x = 122,947.65 × 73,209.90
  4. Step 4: Simplify right side
    81,965.10x = 9,000,985,161.74
  5. Step 5: Solve for x
    x = 9,000,985,161.74/81,965.10
  6. Step 6: Final answer
    x = 109,814.85

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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.