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Finding the Fourth Proportional to 128,042.20, 192,063.30 and 88,643.80

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Solution

The fourth proportional to 128,042.20, 192,063.30 and 88,643.80 is: 132,965.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,042.20 : 192,063.30 = 88,643.80 : x
  2. Step 2: Convert to fraction form
    128,042.20/192,063.30 = 88,643.80/x
  3. Step 3: Cross multiply
    128,042.20x = 192,063.30 × 88,643.80
  4. Step 4: Simplify right side
    128,042.20x = 17,025,220,752.54
  5. Step 5: Solve for x
    x = 17,025,220,752.54/128,042.20
  6. Step 6: Final answer
    x = 132,965.70

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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.