Home / 91,982.70-137,974.05-77,111.10

Finding the Fourth Proportional to 91,982.70, 137,974.05 and 77,111.10

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Solution

The fourth proportional to 91,982.70, 137,974.05 and 77,111.10 is: 115,666.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,982.70 : 137,974.05 = 77,111.10 : x
  2. Step 2: Convert to fraction form
    91,982.70/137,974.05 = 77,111.10/x
  3. Step 3: Cross multiply
    91,982.70x = 137,974.05 × 77,111.10
  4. Step 4: Simplify right side
    91,982.70x = 10,639,330,766.96
  5. Step 5: Solve for x
    x = 10,639,330,766.96/91,982.70
  6. Step 6: Final answer
    x = 115,666.65

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Similar ratio
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1.5x scale

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.