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Finding the Fourth Proportional to 80,904.42, 111,394.02 and 68,781.05

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Solution

The fourth proportional to 80,904.42, 111,394.02 and 68,781.05 is: 94,701.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,904.42 : 111,394.02 = 68,781.05 : x
  2. Step 2: Convert to fraction form
    80,904.42/111,394.02 = 68,781.05/x
  3. Step 3: Cross multiply
    80,904.42x = 111,394.02 × 68,781.05
  4. Step 4: Simplify right side
    80,904.42x = 7,661,797,102.35
  5. Step 5: Solve for x
    x = 7,661,797,102.35/80,904.42
  6. Step 6: Final answer
    x = 94,701.84

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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.