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Finding the Fourth Proportional to 128,031.20, 192,046.80 and 114,552.80

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Solution

The fourth proportional to 128,031.20, 192,046.80 and 114,552.80 is: 171,829.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,031.20 : 192,046.80 = 114,552.80 : x
  2. Step 2: Convert to fraction form
    128,031.20/192,046.80 = 114,552.80/x
  3. Step 3: Cross multiply
    128,031.20x = 192,046.80 × 114,552.80
  4. Step 4: Simplify right side
    128,031.20x = 21,999,498,671.04
  5. Step 5: Solve for x
    x = 21,999,498,671.04/128,031.20
  6. Step 6: Final answer
    x = 171,829.20

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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.