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Finding the Fourth Proportional to 121,630.40, 182,402.40 and 84,190.40

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Solution

The fourth proportional to 121,630.40, 182,402.40 and 84,190.40 is: 126,255.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,630.40 : 182,402.40 = 84,190.40 : x
  2. Step 2: Convert to fraction form
    121,630.40/182,402.40 = 84,190.40/x
  3. Step 3: Cross multiply
    121,630.40x = 182,402.40 × 84,190.40
  4. Step 4: Simplify right side
    121,630.40x = 15,356,531,016.96
  5. Step 5: Solve for x
    x = 15,356,531,016.96/121,630.40
  6. Step 6: Final answer
    x = 126,255.70

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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.