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Finding the Fourth Proportional to 81,858.42, 122,808.07 and 28,551.17

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Solution

The fourth proportional to 81,858.42, 122,808.07 and 28,551.17 is: 42,833.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,858.42 : 122,808.07 = 28,551.17 : x
  2. Step 2: Convert to fraction form
    81,858.42/122,808.07 = 28,551.17/x
  3. Step 3: Cross multiply
    81,858.42x = 122,808.07 × 28,551.17
  4. Step 4: Simplify right side
    81,858.42x = 3,506,313,630.56
  5. Step 5: Solve for x
    x = 3,506,313,630.56/81,858.42
  6. Step 6: Final answer
    x = 42,833.88

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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.