Home / 99,654.18-137,505.86-57,211.80

Finding the Fourth Proportional to 99,654.18, 137,505.86 and 57,211.80

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Solution

The fourth proportional to 99,654.18, 137,505.86 and 57,211.80 is: 78,942.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,654.18 : 137,505.86 = 57,211.80 : x
  2. Step 2: Convert to fraction form
    99,654.18/137,505.86 = 57,211.80/x
  3. Step 3: Cross multiply
    99,654.18x = 137,505.86 × 57,211.80
  4. Step 4: Simplify right side
    99,654.18x = 7,866,957,761.15
  5. Step 5: Solve for x
    x = 7,866,957,761.15/99,654.18
  6. Step 6: Final answer
    x = 78,942.58

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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.