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Finding the Fourth Proportional to 124,867, 172,317.18 and 80,155

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Solution

The fourth proportional to 124,867, 172,317.18 and 80,155 is: 110,614.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,867 : 172,317.18 = 80,155 : x
  2. Step 2: Convert to fraction form
    124,867/172,317.18 = 80,155/x
  3. Step 3: Cross multiply
    124,867x = 172,317.18 × 80,155
  4. Step 4: Simplify right side
    124,867x = 13,812,083,562.90
  5. Step 5: Solve for x
    x = 13,812,083,562.90/124,867
  6. Step 6: Final answer
    x = 110,614.36

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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.