Home / 99,892.20-137,934.18-66,509.80

Finding the Fourth Proportional to 99,892.20, 137,934.18 and 66,509.80

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Solution

The fourth proportional to 99,892.20, 137,934.18 and 66,509.80 is: 91,838.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,892.20 : 137,934.18 = 66,509.80 : x
  2. Step 2: Convert to fraction form
    99,892.20/137,934.18 = 66,509.80/x
  3. Step 3: Cross multiply
    99,892.20x = 137,934.18 × 66,509.80
  4. Step 4: Simplify right side
    99,892.20x = 9,173,974,724.96
  5. Step 5: Solve for x
    x = 9,173,974,724.96/99,892.20
  6. Step 6: Final answer
    x = 91,838.75

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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.