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Finding the Fourth Proportional to 121,702.72, 167,951.04 and 71,402.56

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Solution

The fourth proportional to 121,702.72, 167,951.04 and 71,402.56 is: 98,536.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,702.72 : 167,951.04 = 71,402.56 : x
  2. Step 2: Convert to fraction form
    121,702.72/167,951.04 = 71,402.56/x
  3. Step 3: Cross multiply
    121,702.72x = 167,951.04 × 71,402.56
  4. Step 4: Simplify right side
    121,702.72x = 11,992,134,210.66
  5. Step 5: Solve for x
    x = 11,992,134,210.66/121,702.72
  6. Step 6: Final answer
    x = 98,536.29

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1.5x scale

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.