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Finding the Fourth Proportional to 121,601, 182,251.74 and 86,349.80

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Solution

The fourth proportional to 121,601, 182,251.74 and 86,349.80 is: 129,418.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,601 : 182,251.74 = 86,349.80 : x
  2. Step 2: Convert to fraction form
    121,601/182,251.74 = 86,349.80/x
  3. Step 3: Cross multiply
    121,601x = 182,251.74 × 86,349.80
  4. Step 4: Simplify right side
    121,601x = 15,737,401,298.65
  5. Step 5: Solve for x
    x = 15,737,401,298.65/121,601
  6. Step 6: Final answer
    x = 129,418.35

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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.