Home / 103,979.20-155,997.60-68,987.20

Finding the Fourth Proportional to 103,979.20, 155,997.60 and 68,987.20

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Solution

The fourth proportional to 103,979.20, 155,997.60 and 68,987.20 is: 103,499.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,979.20 : 155,997.60 = 68,987.20 : x
  2. Step 2: Convert to fraction form
    103,979.20/155,997.60 = 68,987.20/x
  3. Step 3: Cross multiply
    103,979.20x = 155,997.60 × 68,987.20
  4. Step 4: Simplify right side
    103,979.20x = 10,761,837,630.72
  5. Step 5: Solve for x
    x = 10,761,837,630.72/103,979.20
  6. Step 6: Final answer
    x = 103,499.91

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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.