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Finding the Fourth Proportional to 124,805.70, 172,231.56 and 68,217.48

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Solution

The fourth proportional to 124,805.70, 172,231.56 and 68,217.48 is: 94,139.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,805.70 : 172,231.56 = 68,217.48 : x
  2. Step 2: Convert to fraction form
    124,805.70/172,231.56 = 68,217.48/x
  3. Step 3: Cross multiply
    124,805.70x = 172,231.56 × 68,217.48
  4. Step 4: Simplify right side
    124,805.70x = 11,749,202,999.67
  5. Step 5: Solve for x
    x = 11,749,202,999.67/124,805.70
  6. Step 6: Final answer
    x = 94,139.96

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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.