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Finding the Fourth Proportional to 121,689.66, 182,090.40 and 71,793.66

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Solution

The fourth proportional to 121,689.66, 182,090.40 and 71,793.66 is: 107,428.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,689.66 : 182,090.40 = 71,793.66 : x
  2. Step 2: Convert to fraction form
    121,689.66/182,090.40 = 71,793.66/x
  3. Step 3: Cross multiply
    121,689.66x = 182,090.40 × 71,793.66
  4. Step 4: Simplify right side
    121,689.66x = 13,072,936,266.86
  5. Step 5: Solve for x
    x = 13,072,936,266.86/121,689.66
  6. Step 6: Final answer
    x = 107,428.49

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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.