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Finding the Fourth Proportional to 121,540.96, 182,330.88 and 51,420.88

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Solution

The fourth proportional to 121,540.96, 182,330.88 and 51,420.88 is: 77,139.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,540.96 : 182,330.88 = 51,420.88 : x
  2. Step 2: Convert to fraction form
    121,540.96/182,330.88 = 51,420.88/x
  3. Step 3: Cross multiply
    121,540.96x = 182,330.88 × 51,420.88
  4. Step 4: Simplify right side
    121,540.96x = 9,375,614,300.77
  5. Step 5: Solve for x
    x = 9,375,614,300.77/121,540.96
  6. Step 6: Final answer
    x = 77,139.54

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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.