Home / 129,448.47-193,910.27-66,987.75

Finding the Fourth Proportional to 129,448.47, 193,910.27 and 66,987.75

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Solution

The fourth proportional to 129,448.47, 193,910.27 and 66,987.75 is: 100,345.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,448.47 : 193,910.27 = 66,987.75 : x
  2. Step 2: Convert to fraction form
    129,448.47/193,910.27 = 66,987.75/x
  3. Step 3: Cross multiply
    129,448.47x = 193,910.27 × 66,987.75
  4. Step 4: Simplify right side
    129,448.47x = 12,989,612,354.25
  5. Step 5: Solve for x
    x = 12,989,612,354.25/129,448.47
  6. Step 6: Final answer
    x = 100,345.82

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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.