Home / 99,358.72-137,128.96-61,645.12

Finding the Fourth Proportional to 99,358.72, 137,128.96 and 61,645.12

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Solution

The fourth proportional to 99,358.72, 137,128.96 and 61,645.12 is: 85,078.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,358.72 : 137,128.96 = 61,645.12 : x
  2. Step 2: Convert to fraction form
    99,358.72/137,128.96 = 61,645.12/x
  3. Step 3: Cross multiply
    99,358.72x = 137,128.96 × 61,645.12
  4. Step 4: Simplify right side
    99,358.72x = 8,453,331,194.68
  5. Step 5: Solve for x
    x = 8,453,331,194.68/99,358.72
  6. Step 6: Final answer
    x = 85,078.91

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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.