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Finding the Fourth Proportional to 123,100.90, 169,766.47 and 80,682.82

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Solution

The fourth proportional to 123,100.90, 169,766.47 and 80,682.82 is: 111,268.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,100.90 : 169,766.47 = 80,682.82 : x
  2. Step 2: Convert to fraction form
    123,100.90/169,766.47 = 80,682.82/x
  3. Step 3: Cross multiply
    123,100.90x = 169,766.47 × 80,682.82
  4. Step 4: Simplify right side
    123,100.90x = 13,697,237,541.05
  5. Step 5: Solve for x
    x = 13,697,237,541.05/123,100.90
  6. Step 6: Final answer
    x = 111,268.38

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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.