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Finding the Fourth Proportional to 123,967.71, 171,074.16 and 67,378.68

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Solution

The fourth proportional to 123,967.71, 171,074.16 and 67,378.68 is: 92,981.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,967.71 : 171,074.16 = 67,378.68 : x
  2. Step 2: Convert to fraction form
    123,967.71/171,074.16 = 67,378.68/x
  3. Step 3: Cross multiply
    123,967.71x = 171,074.16 × 67,378.68
  4. Step 4: Simplify right side
    123,967.71x = 11,526,751,082.91
  5. Step 5: Solve for x
    x = 11,526,751,082.91/123,967.71
  6. Step 6: Final answer
    x = 92,981.88

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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.