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Finding the Fourth Proportional to 123,900.28, 170,981.94 and 67,311.16

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Solution

The fourth proportional to 123,900.28, 170,981.94 and 67,311.16 is: 92,889.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,900.28 : 170,981.94 = 67,311.16 : x
  2. Step 2: Convert to fraction form
    123,900.28/170,981.94 = 67,311.16/x
  3. Step 3: Cross multiply
    123,900.28x = 170,981.94 × 67,311.16
  4. Step 4: Simplify right side
    123,900.28x = 11,508,992,720.45
  5. Step 5: Solve for x
    x = 11,508,992,720.45/123,900.28
  6. Step 6: Final answer
    x = 92,889.16

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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.