Home / 122,961.20-169,764.90-100,354.18

Finding the Fourth Proportional to 122,961.20, 169,764.90 and 100,354.18

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Solution

The fourth proportional to 122,961.20, 169,764.90 and 100,354.18 is: 138,552.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,961.20 : 169,764.90 = 100,354.18 : x
  2. Step 2: Convert to fraction form
    122,961.20/169,764.90 = 100,354.18/x
  3. Step 3: Cross multiply
    122,961.20x = 169,764.90 × 100,354.18
  4. Step 4: Simplify right side
    122,961.20x = 17,036,617,332.28
  5. Step 5: Solve for x
    x = 17,036,617,332.28/122,961.20
  6. Step 6: Final answer
    x = 138,552.79

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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.