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Finding the Fourth Proportional to 128,019.60, 192,029.40 and 120,632.40

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Solution

The fourth proportional to 128,019.60, 192,029.40 and 120,632.40 is: 180,948.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,019.60 : 192,029.40 = 120,632.40 : x
  2. Step 2: Convert to fraction form
    128,019.60/192,029.40 = 120,632.40/x
  3. Step 3: Cross multiply
    128,019.60x = 192,029.40 × 120,632.40
  4. Step 4: Simplify right side
    128,019.60x = 23,164,967,392.56
  5. Step 5: Solve for x
    x = 23,164,967,392.56/128,019.60
  6. Step 6: Final answer
    x = 180,948.60

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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.