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Finding the Fourth Proportional to 83,707.65, 125,401.10 and 80,893.71

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Solution

The fourth proportional to 83,707.65, 125,401.10 and 80,893.71 is: 121,185.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,707.65 : 125,401.10 = 80,893.71 : x
  2. Step 2: Convert to fraction form
    83,707.65/125,401.10 = 80,893.71/x
  3. Step 3: Cross multiply
    83,707.65x = 125,401.10 × 80,893.71
  4. Step 4: Simplify right side
    83,707.65x = 10,144,159,812.61
  5. Step 5: Solve for x
    x = 10,144,159,812.61/83,707.65
  6. Step 6: Final answer
    x = 121,185.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.