Home / 115,403.82-172,650.24-87,404.55

Finding the Fourth Proportional to 115,403.82, 172,650.24 and 87,404.55

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Solution

The fourth proportional to 115,403.82, 172,650.24 and 87,404.55 is: 130,761.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,403.82 : 172,650.24 = 87,404.55 : x
  2. Step 2: Convert to fraction form
    115,403.82/172,650.24 = 87,404.55/x
  3. Step 3: Cross multiply
    115,403.82x = 172,650.24 × 87,404.55
  4. Step 4: Simplify right side
    115,403.82x = 15,090,416,534.59
  5. Step 5: Solve for x
    x = 15,090,416,534.59/115,403.82
  6. Step 6: Final answer
    x = 130,761.85

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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.