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Finding the Fourth Proportional to 123,679.74, 170,678.48 and 67,091.52

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Solution

The fourth proportional to 123,679.74, 170,678.48 and 67,091.52 is: 92,586.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,679.74 : 170,678.48 = 67,091.52 : x
  2. Step 2: Convert to fraction form
    123,679.74/170,678.48 = 67,091.52/x
  3. Step 3: Cross multiply
    123,679.74x = 170,678.48 × 67,091.52
  4. Step 4: Simplify right side
    123,679.74x = 11,451,078,319.03
  5. Step 5: Solve for x
    x = 11,451,078,319.03/123,679.74
  6. Step 6: Final answer
    x = 92,586.53

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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.