Home / 99,805.20-137,729.12-57,362.64

Finding the Fourth Proportional to 99,805.20, 137,729.12 and 57,362.64

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Solution

The fourth proportional to 99,805.20, 137,729.12 and 57,362.64 is: 79,159.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,805.20 : 137,729.12 = 57,362.64 : x
  2. Step 2: Convert to fraction form
    99,805.20/137,729.12 = 57,362.64/x
  3. Step 3: Cross multiply
    99,805.20x = 137,729.12 × 57,362.64
  4. Step 4: Simplify right side
    99,805.20x = 7,900,505,928.08
  5. Step 5: Solve for x
    x = 7,900,505,928.08/99,805.20
  6. Step 6: Final answer
    x = 79,159.26

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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.