Home / 109,711.29-151,412.31-66,687

Finding the Fourth Proportional to 109,711.29, 151,412.31 and 66,687

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Solution

The fourth proportional to 109,711.29, 151,412.31 and 66,687 is: 92,034.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,711.29 : 151,412.31 = 66,687 : x
  2. Step 2: Convert to fraction form
    109,711.29/151,412.31 = 66,687/x
  3. Step 3: Cross multiply
    109,711.29x = 151,412.31 × 66,687
  4. Step 4: Simplify right side
    109,711.29x = 10,097,232,716.97
  5. Step 5: Solve for x
    x = 10,097,232,716.97/109,711.29
  6. Step 6: Final answer
    x = 92,034.58

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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.