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Finding the Fourth Proportional to 128,800.80, 192,812.40 and 128,800.80

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Solution

The fourth proportional to 128,800.80, 192,812.40 and 128,800.80 is: 192,812.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,800.80 : 192,812.40 = 128,800.80 : x
  2. Step 2: Convert to fraction form
    128,800.80/192,812.40 = 128,800.80/x
  3. Step 3: Cross multiply
    128,800.80x = 192,812.40 × 128,800.80
  4. Step 4: Simplify right side
    128,800.80x = 24,834,391,369.92
  5. Step 5: Solve for x
    x = 24,834,391,369.92/128,800.80
  6. Step 6: Final answer
    x = 192,812.40

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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.