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Finding the Fourth Proportional to 123,801.75, 170,885.31 and 79,089.75

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Solution

The fourth proportional to 123,801.75, 170,885.31 and 79,089.75 is: 109,168.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,801.75 : 170,885.31 = 79,089.75 : x
  2. Step 2: Convert to fraction form
    123,801.75/170,885.31 = 79,089.75/x
  3. Step 3: Cross multiply
    123,801.75x = 170,885.31 × 79,089.75
  4. Step 4: Simplify right side
    123,801.75x = 13,515,276,446.57
  5. Step 5: Solve for x
    x = 13,515,276,446.57/123,801.75
  6. Step 6: Final answer
    x = 109,168.70

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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.