Home / 99,921.75-137,892.02-57,480.29

Finding the Fourth Proportional to 99,921.75, 137,892.02 and 57,480.29

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Solution

The fourth proportional to 99,921.75, 137,892.02 and 57,480.29 is: 79,322.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,921.75 : 137,892.02 = 57,480.29 : x
  2. Step 2: Convert to fraction form
    99,921.75/137,892.02 = 57,480.29/x
  3. Step 3: Cross multiply
    99,921.75x = 137,892.02 × 57,480.29
  4. Step 4: Simplify right side
    99,921.75x = 7,926,072,321.42
  5. Step 5: Solve for x
    x = 7,926,072,321.42/99,921.75
  6. Step 6: Final answer
    x = 79,322.79

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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.