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Finding the Fourth Proportional to 128,001.70, 192,002.55 and 115,713.70

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Solution

The fourth proportional to 128,001.70, 192,002.55 and 115,713.70 is: 173,570.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,001.70 : 192,002.55 = 115,713.70 : x
  2. Step 2: Convert to fraction form
    128,001.70/192,002.55 = 115,713.70/x
  3. Step 3: Cross multiply
    128,001.70x = 192,002.55 × 115,713.70
  4. Step 4: Simplify right side
    128,001.70x = 22,217,325,469.94
  5. Step 5: Solve for x
    x = 22,217,325,469.94/128,001.70
  6. Step 6: Final answer
    x = 173,570.55

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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.