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Finding the Fourth Proportional to 124,990.68, 172,487.70 and 68,401.92

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Solution

The fourth proportional to 124,990.68, 172,487.70 and 68,401.92 is: 94,394.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,990.68 : 172,487.70 = 68,401.92 : x
  2. Step 2: Convert to fraction form
    124,990.68/172,487.70 = 68,401.92/x
  3. Step 3: Cross multiply
    124,990.68x = 172,487.70 × 68,401.92
  4. Step 4: Simplify right side
    124,990.68x = 11,798,489,856.38
  5. Step 5: Solve for x
    x = 11,798,489,856.38/124,990.68
  6. Step 6: Final answer
    x = 94,394.96

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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.