Home / 81,119.17-121,513.52-66,179.53

Finding the Fourth Proportional to 81,119.17, 121,513.52 and 66,179.53

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Solution

The fourth proportional to 81,119.17, 121,513.52 and 66,179.53 is: 99,134.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,119.17 : 121,513.52 = 66,179.53 : x
  2. Step 2: Convert to fraction form
    81,119.17/121,513.52 = 66,179.53/x
  3. Step 3: Cross multiply
    81,119.17x = 121,513.52 × 66,179.53
  4. Step 4: Simplify right side
    81,119.17x = 8,041,707,587.33
  5. Step 5: Solve for x
    x = 8,041,707,587.33/81,119.17
  6. Step 6: Final answer
    x = 99,134.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.