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Finding the Fourth Proportional to 121,402.80, 167,527.17 and 67,690.62

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Solution

The fourth proportional to 121,402.80, 167,527.17 and 67,690.62 is: 93,408.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,402.80 : 167,527.17 = 67,690.62 : x
  2. Step 2: Convert to fraction form
    121,402.80/167,527.17 = 67,690.62/x
  3. Step 3: Cross multiply
    121,402.80x = 167,527.17 × 67,690.62
  4. Step 4: Simplify right side
    121,402.80x = 11,340,018,004.15
  5. Step 5: Solve for x
    x = 11,340,018,004.15/121,402.80
  6. Step 6: Final answer
    x = 93,408.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.