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Finding the Fourth Proportional to 148,690.80, 205,099.92 and 88,218.66

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Solution

The fourth proportional to 148,690.80, 205,099.92 and 88,218.66 is: 121,686.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,690.80 : 205,099.92 = 88,218.66 : x
  2. Step 2: Convert to fraction form
    148,690.80/205,099.92 = 88,218.66/x
  3. Step 3: Cross multiply
    148,690.80x = 205,099.92 × 88,218.66
  4. Step 4: Simplify right side
    148,690.80x = 18,093,640,108.51
  5. Step 5: Solve for x
    x = 18,093,640,108.51/148,690.80
  6. Step 6: Final answer
    x = 121,686.35

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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.