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Finding the Fourth Proportional to 128,123.20, 192,127.20 and 49,211.20

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Solution

The fourth proportional to 128,123.20, 192,127.20 and 49,211.20 is: 73,794.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,123.20 : 192,127.20 = 49,211.20 : x
  2. Step 2: Convert to fraction form
    128,123.20/192,127.20 = 49,211.20/x
  3. Step 3: Cross multiply
    128,123.20x = 192,127.20 × 49,211.20
  4. Step 4: Simplify right side
    128,123.20x = 9,454,810,064.64
  5. Step 5: Solve for x
    x = 9,454,810,064.64/128,123.20
  6. Step 6: Final answer
    x = 73,794.68

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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.