Home / 99,724.08-137,429.28-71,380.56

Finding the Fourth Proportional to 99,724.08, 137,429.28 and 71,380.56

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Solution

The fourth proportional to 99,724.08, 137,429.28 and 71,380.56 is: 98,369.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,724.08 : 137,429.28 = 71,380.56 : x
  2. Step 2: Convert to fraction form
    99,724.08/137,429.28 = 71,380.56/x
  3. Step 3: Cross multiply
    99,724.08x = 137,429.28 × 71,380.56
  4. Step 4: Simplify right side
    99,724.08x = 9,809,778,966.80
  5. Step 5: Solve for x
    x = 9,809,778,966.80/99,724.08
  6. Step 6: Final answer
    x = 98,369.21

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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.