Home / 88,680.72-121,690.62-80,661.84

Finding the Fourth Proportional to 88,680.72, 121,690.62 and 80,661.84

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Solution

The fourth proportional to 88,680.72, 121,690.62 and 80,661.84 is: 110,686.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,680.72 : 121,690.62 = 80,661.84 : x
  2. Step 2: Convert to fraction form
    88,680.72/121,690.62 = 80,661.84/x
  3. Step 3: Cross multiply
    88,680.72x = 121,690.62 × 80,661.84
  4. Step 4: Simplify right side
    88,680.72x = 9,815,789,319.94
  5. Step 5: Solve for x
    x = 9,815,789,319.94/88,680.72
  6. Step 6: Final answer
    x = 110,686.85

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.