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Finding the Fourth Proportional to 121,594.50, 182,241.99 and 86,343.30

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Solution

The fourth proportional to 121,594.50, 182,241.99 and 86,343.30 is: 129,408.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,594.50 : 182,241.99 = 86,343.30 : x
  2. Step 2: Convert to fraction form
    121,594.50/182,241.99 = 86,343.30/x
  3. Step 3: Cross multiply
    121,594.50x = 182,241.99 × 86,343.30
  4. Step 4: Simplify right side
    121,594.50x = 15,735,374,815.17
  5. Step 5: Solve for x
    x = 15,735,374,815.17/121,594.50
  6. Step 6: Final answer
    x = 129,408.61

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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.