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Finding the Fourth Proportional to 121,354.89, 182,114.34 and 42,469.80

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Solution

The fourth proportional to 121,354.89, 182,114.34 and 42,469.80 is: 63,733.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,354.89 : 182,114.34 = 42,469.80 : x
  2. Step 2: Convert to fraction form
    121,354.89/182,114.34 = 42,469.80/x
  3. Step 3: Cross multiply
    121,354.89x = 182,114.34 × 42,469.80
  4. Step 4: Simplify right side
    121,354.89x = 7,734,359,596.93
  5. Step 5: Solve for x
    x = 7,734,359,596.93/121,354.89
  6. Step 6: Final answer
    x = 63,733.40

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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.