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Finding the Fourth Proportional to 128,470.80, 192,706.20 and 128,470.80

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Solution

The fourth proportional to 128,470.80, 192,706.20 and 128,470.80 is: 192,706.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,470.80 : 192,706.20 = 128,470.80 : x
  2. Step 2: Convert to fraction form
    128,470.80/192,706.20 = 128,470.80/x
  3. Step 3: Cross multiply
    128,470.80x = 192,706.20 × 128,470.80
  4. Step 4: Simplify right side
    128,470.80x = 24,757,119,678.96
  5. Step 5: Solve for x
    x = 24,757,119,678.96/128,470.80
  6. Step 6: Final answer
    x = 192,706.20

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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.