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Finding the Fourth Proportional to 121,092.60, 181,746.90 and 71,110.20

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Solution

The fourth proportional to 121,092.60, 181,746.90 and 71,110.20 is: 106,728.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,092.60 : 181,746.90 = 71,110.20 : x
  2. Step 2: Convert to fraction form
    121,092.60/181,746.90 = 71,110.20/x
  3. Step 3: Cross multiply
    121,092.60x = 181,746.90 × 71,110.20
  4. Step 4: Simplify right side
    121,092.60x = 12,924,058,408.38
  5. Step 5: Solve for x
    x = 12,924,058,408.38/121,092.60
  6. Step 6: Final answer
    x = 106,728.72

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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.