Home / 100,679.04-138,934.20-55,356.96

Finding the Fourth Proportional to 100,679.04, 138,934.20 and 55,356.96

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Solution

The fourth proportional to 100,679.04, 138,934.20 and 55,356.96 is: 76,391.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,679.04 : 138,934.20 = 55,356.96 : x
  2. Step 2: Convert to fraction form
    100,679.04/138,934.20 = 55,356.96/x
  3. Step 3: Cross multiply
    100,679.04x = 138,934.20 × 55,356.96
  4. Step 4: Simplify right side
    100,679.04x = 7,690,974,952.03
  5. Step 5: Solve for x
    x = 7,690,974,952.03/100,679.04
  6. Step 6: Final answer
    x = 76,391.02

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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.