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Finding the Fourth Proportional to 123,084.55, 169,791.55 and 84,778.20

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Solution

The fourth proportional to 123,084.55, 169,791.55 and 84,778.20 is: 116,949.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,084.55 : 169,791.55 = 84,778.20 : x
  2. Step 2: Convert to fraction form
    123,084.55/169,791.55 = 84,778.20/x
  3. Step 3: Cross multiply
    123,084.55x = 169,791.55 × 84,778.20
  4. Step 4: Simplify right side
    123,084.55x = 14,394,621,984.21
  5. Step 5: Solve for x
    x = 14,394,621,984.21/123,084.55
  6. Step 6: Final answer
    x = 116,949.06

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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.