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Finding the Fourth Proportional to 121,947.40, 182,661.90 and 101,211.40

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Solution

The fourth proportional to 121,947.40, 182,661.90 and 101,211.40 is: 151,601.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,947.40 : 182,661.90 = 101,211.40 : x
  2. Step 2: Convert to fraction form
    121,947.40/182,661.90 = 101,211.40/x
  3. Step 3: Cross multiply
    121,947.40x = 182,661.90 × 101,211.40
  4. Step 4: Simplify right side
    121,947.40x = 18,487,466,625.66
  5. Step 5: Solve for x
    x = 18,487,466,625.66/121,947.40
  6. Step 6: Final answer
    x = 151,601.97

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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.