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Finding the Fourth Proportional to 81,704.84, 112,795.68 and 54,987.80

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Solution

The fourth proportional to 81,704.84, 112,795.68 and 54,987.80 is: 75,912.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,704.84 : 112,795.68 = 54,987.80 : x
  2. Step 2: Convert to fraction form
    81,704.84/112,795.68 = 54,987.80/x
  3. Step 3: Cross multiply
    81,704.84x = 112,795.68 × 54,987.80
  4. Step 4: Simplify right side
    81,704.84x = 6,202,386,292.70
  5. Step 5: Solve for x
    x = 6,202,386,292.70/81,704.84
  6. Step 6: Final answer
    x = 75,912.10

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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.