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Finding the Fourth Proportional to 123,970.36, 171,081.04 and 67,381.88

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Solution

The fourth proportional to 123,970.36, 171,081.04 and 67,381.88 is: 92,988.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,970.36 : 171,081.04 = 67,381.88 : x
  2. Step 2: Convert to fraction form
    123,970.36/171,081.04 = 67,381.88/x
  3. Step 3: Cross multiply
    123,970.36x = 171,081.04 × 67,381.88
  4. Step 4: Simplify right side
    123,970.36x = 11,527,762,107.56
  5. Step 5: Solve for x
    x = 11,527,762,107.56/123,970.36
  6. Step 6: Final answer
    x = 92,988.05

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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.