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Finding the Fourth Proportional to 124,991.96, 172,499.68 and 71,279.24

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Solution

The fourth proportional to 124,991.96, 172,499.68 and 71,279.24 is: 98,371.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,991.96 : 172,499.68 = 71,279.24 : x
  2. Step 2: Convert to fraction form
    124,991.96/172,499.68 = 71,279.24/x
  3. Step 3: Cross multiply
    124,991.96x = 172,499.68 × 71,279.24
  4. Step 4: Simplify right side
    124,991.96x = 12,295,646,090.64
  5. Step 5: Solve for x
    x = 12,295,646,090.64/124,991.96
  6. Step 6: Final answer
    x = 98,371.50

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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.