Home / 129,115.48-178,200.66-75,400.06

Finding the Fourth Proportional to 129,115.48, 178,200.66 and 75,400.06

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Solution

The fourth proportional to 129,115.48, 178,200.66 and 75,400.06 is: 104,064.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,115.48 : 178,200.66 = 75,400.06 : x
  2. Step 2: Convert to fraction form
    129,115.48/178,200.66 = 75,400.06/x
  3. Step 3: Cross multiply
    129,115.48x = 178,200.66 × 75,400.06
  4. Step 4: Simplify right side
    129,115.48x = 13,436,340,456.04
  5. Step 5: Solve for x
    x = 13,436,340,456.04/129,115.48
  6. Step 6: Final answer
    x = 104,064.52

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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.