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Finding the Fourth Proportional to 123,987.27, 171,121.15 and 75,617.27

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Solution

The fourth proportional to 123,987.27, 171,121.15 and 75,617.27 is: 104,363.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,987.27 : 171,121.15 = 75,617.27 : x
  2. Step 2: Convert to fraction form
    123,987.27/171,121.15 = 75,617.27/x
  3. Step 3: Cross multiply
    123,987.27x = 171,121.15 × 75,617.27
  4. Step 4: Simplify right side
    123,987.27x = 12,939,714,202.26
  5. Step 5: Solve for x
    x = 12,939,714,202.26/123,987.27
  6. Step 6: Final answer
    x = 104,363.25

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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.