Home / 99,982.20-137,975.70-54,660.72

Finding the Fourth Proportional to 99,982.20, 137,975.70 and 54,660.72

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Solution

The fourth proportional to 99,982.20, 137,975.70 and 54,660.72 is: 75,431.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,982.20 : 137,975.70 = 54,660.72 : x
  2. Step 2: Convert to fraction form
    99,982.20/137,975.70 = 54,660.72/x
  3. Step 3: Cross multiply
    99,982.20x = 137,975.70 × 54,660.72
  4. Step 4: Simplify right side
    99,982.20x = 7,541,851,104.50
  5. Step 5: Solve for x
    x = 7,541,851,104.50/99,982.20
  6. Step 6: Final answer
    x = 75,431.94

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1.5x scale

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.