Home / 115,403.45-172,649.68-87,404.18

Finding the Fourth Proportional to 115,403.45, 172,649.68 and 87,404.18

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Solution

The fourth proportional to 115,403.45, 172,649.68 and 87,404.18 is: 130,761.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,403.45 : 172,649.68 = 87,404.18 : x
  2. Step 2: Convert to fraction form
    115,403.45/172,649.68 = 87,404.18/x
  3. Step 3: Cross multiply
    115,403.45x = 172,649.68 × 87,404.18
  4. Step 4: Simplify right side
    115,403.45x = 15,090,302,625.90
  5. Step 5: Solve for x
    x = 15,090,302,625.90/115,403.45
  6. Step 6: Final answer
    x = 130,761.28

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1.5x scale

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.