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Finding the Fourth Proportional to 123,987.14, 171,120.96 and 75,617.14

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Solution

The fourth proportional to 123,987.14, 171,120.96 and 75,617.14 is: 104,363.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,987.14 : 171,120.96 = 75,617.14 : x
  2. Step 2: Convert to fraction form
    123,987.14/171,120.96 = 75,617.14/x
  3. Step 3: Cross multiply
    123,987.14x = 171,120.96 × 75,617.14
  4. Step 4: Simplify right side
    123,987.14x = 12,939,676,733.65
  5. Step 5: Solve for x
    x = 12,939,676,733.65/123,987.14
  6. Step 6: Final answer
    x = 104,363.06

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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.