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Finding the Fourth Proportional to 124,990.96, 172,498.30 and 71,278.24

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Solution

The fourth proportional to 124,990.96, 172,498.30 and 71,278.24 is: 98,370.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,990.96 : 172,498.30 = 71,278.24 : x
  2. Step 2: Convert to fraction form
    124,990.96/172,498.30 = 71,278.24/x
  3. Step 3: Cross multiply
    124,990.96x = 172,498.30 × 71,278.24
  4. Step 4: Simplify right side
    124,990.96x = 12,295,375,226.99
  5. Step 5: Solve for x
    x = 12,295,375,226.99/124,990.96
  6. Step 6: Final answer
    x = 98,370.12

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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.