Home / 99,771.20-137,679.96-54,448.04

Finding the Fourth Proportional to 99,771.20, 137,679.96 and 54,448.04

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Solution

The fourth proportional to 99,771.20, 137,679.96 and 54,448.04 is: 75,135.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,771.20 : 137,679.96 = 54,448.04 : x
  2. Step 2: Convert to fraction form
    99,771.20/137,679.96 = 54,448.04/x
  3. Step 3: Cross multiply
    99,771.20x = 137,679.96 × 54,448.04
  4. Step 4: Simplify right side
    99,771.20x = 7,496,403,969.28
  5. Step 5: Solve for x
    x = 7,496,403,969.28/99,771.20
  6. Step 6: Final answer
    x = 75,135.95

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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.