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Finding the Fourth Proportional to 128,552.48, 192,902.56 and 100,393.49

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Solution

The fourth proportional to 128,552.48, 192,902.56 and 100,393.49 is: 150,647.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,552.48 : 192,902.56 = 100,393.49 : x
  2. Step 2: Convert to fraction form
    128,552.48/192,902.56 = 100,393.49/x
  3. Step 3: Cross multiply
    128,552.48x = 192,902.56 × 100,393.49
  4. Step 4: Simplify right side
    128,552.48x = 19,366,162,024.32
  5. Step 5: Solve for x
    x = 19,366,162,024.32/128,552.48
  6. Step 6: Final answer
    x = 150,647.90

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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.