Home / 115,404.45-172,651.17-87,405.18

Finding the Fourth Proportional to 115,404.45, 172,651.17 and 87,405.18

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Solution

The fourth proportional to 115,404.45, 172,651.17 and 87,405.18 is: 130,762.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,404.45 : 172,651.17 = 87,405.18 : x
  2. Step 2: Convert to fraction form
    115,404.45/172,651.17 = 87,405.18/x
  3. Step 3: Cross multiply
    115,404.45x = 172,651.17 × 87,405.18
  4. Step 4: Simplify right side
    115,404.45x = 15,090,606,591.06
  5. Step 5: Solve for x
    x = 15,090,606,591.06/115,404.45
  6. Step 6: Final answer
    x = 130,762.78

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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.