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Finding the Fourth Proportional to 128,088.95, 192,161.97 and 39,351.42

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Solution

The fourth proportional to 128,088.95, 192,161.97 and 39,351.42 is: 59,035.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,088.95 : 192,161.97 = 39,351.42 : x
  2. Step 2: Convert to fraction form
    128,088.95/192,161.97 = 39,351.42/x
  3. Step 3: Cross multiply
    128,088.95x = 192,161.97 × 39,351.42
  4. Step 4: Simplify right side
    128,088.95x = 7,561,846,389.50
  5. Step 5: Solve for x
    x = 7,561,846,389.50/128,088.95
  6. Step 6: Final answer
    x = 59,035.90

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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.