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Finding the Fourth Proportional to 121,702.57, 167,946.27 and 66,509.73

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Solution

The fourth proportional to 121,702.57, 167,946.27 and 66,509.73 is: 91,781.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,702.57 : 167,946.27 = 66,509.73 : x
  2. Step 2: Convert to fraction form
    121,702.57/167,946.27 = 66,509.73/x
  3. Step 3: Cross multiply
    121,702.57x = 167,946.27 × 66,509.73
  4. Step 4: Simplify right side
    121,702.57x = 11,170,061,072.21
  5. Step 5: Solve for x
    x = 11,170,061,072.21/121,702.57
  6. Step 6: Final answer
    x = 91,781.64

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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.