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Finding the Fourth Proportional to 121,593.60, 167,702.40 and 89,971.20

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Solution

The fourth proportional to 121,593.60, 167,702.40 and 89,971.20 is: 124,088.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,593.60 : 167,702.40 = 89,971.20 : x
  2. Step 2: Convert to fraction form
    121,593.60/167,702.40 = 89,971.20/x
  3. Step 3: Cross multiply
    121,593.60x = 167,702.40 × 89,971.20
  4. Step 4: Simplify right side
    121,593.60x = 15,088,386,170.88
  5. Step 5: Solve for x
    x = 15,088,386,170.88/121,593.60
  6. Step 6: Final answer
    x = 124,088.65

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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.