Home / 99,642.12-137,504.52-54,321.90

Finding the Fourth Proportional to 99,642.12, 137,504.52 and 54,321.90

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Solution

The fourth proportional to 99,642.12, 137,504.52 and 54,321.90 is: 74,963.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,642.12 : 137,504.52 = 54,321.90 : x
  2. Step 2: Convert to fraction form
    99,642.12/137,504.52 = 54,321.90/x
  3. Step 3: Cross multiply
    99,642.12x = 137,504.52 × 54,321.90
  4. Step 4: Simplify right side
    99,642.12x = 7,469,506,784.99
  5. Step 5: Solve for x
    x = 7,469,506,784.99/99,642.12
  6. Step 6: Final answer
    x = 74,963.35

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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.