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Finding the Fourth Proportional to 121,472.40, 167,709.96 and 76,212.48

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Solution

The fourth proportional to 121,472.40, 167,709.96 and 76,212.48 is: 105,222.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,472.40 : 167,709.96 = 76,212.48 : x
  2. Step 2: Convert to fraction form
    121,472.40/167,709.96 = 76,212.48/x
  3. Step 3: Cross multiply
    121,472.40x = 167,709.96 × 76,212.48
  4. Step 4: Simplify right side
    121,472.40x = 12,781,591,972.30
  5. Step 5: Solve for x
    x = 12,781,591,972.30/121,472.40
  6. Step 6: Final answer
    x = 105,222.19

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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.