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Finding the Fourth Proportional to 192,638.80, 288,959.10 and 67,979.80

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Solution

The fourth proportional to 192,638.80, 288,959.10 and 67,979.80 is: 101,970.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,638.80 : 288,959.10 = 67,979.80 : x
  2. Step 2: Convert to fraction form
    192,638.80/288,959.10 = 67,979.80/x
  3. Step 3: Cross multiply
    192,638.80x = 288,959.10 × 67,979.80
  4. Step 4: Simplify right side
    192,638.80x = 19,643,381,826.18
  5. Step 5: Solve for x
    x = 19,643,381,826.18/192,638.80
  6. Step 6: Final answer
    x = 101,970.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.