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Finding the Fourth Proportional to 119,439.39, 164,894.34 and 79,207.46

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Solution

The fourth proportional to 119,439.39, 164,894.34 and 79,207.46 is: 109,351.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,439.39 : 164,894.34 = 79,207.46 : x
  2. Step 2: Convert to fraction form
    119,439.39/164,894.34 = 79,207.46/x
  3. Step 3: Cross multiply
    119,439.39x = 164,894.34 × 79,207.46
  4. Step 4: Simplify right side
    119,439.39x = 13,060,861,839.78
  5. Step 5: Solve for x
    x = 13,060,861,839.78/119,439.39
  6. Step 6: Final answer
    x = 109,351.38

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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.