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Finding the Fourth Proportional to 128,600.88, 192,901.34 and 53,680.15

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Solution

The fourth proportional to 128,600.88, 192,901.34 and 53,680.15 is: 80,520.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,600.88 : 192,901.34 = 53,680.15 : x
  2. Step 2: Convert to fraction form
    128,600.88/192,901.34 = 53,680.15/x
  3. Step 3: Cross multiply
    128,600.88x = 192,901.34 × 53,680.15
  4. Step 4: Simplify right side
    128,600.88x = 10,354,972,598.00
  5. Step 5: Solve for x
    x = 10,354,972,598.00/128,600.88
  6. Step 6: Final answer
    x = 80,520.23

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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.