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Finding the Fourth Proportional to 143,919.16, 216,100.17 and 128,271.17

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Solution

The fourth proportional to 143,919.16, 216,100.17 and 128,271.17 is: 192,604.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,919.16 : 216,100.17 = 128,271.17 : x
  2. Step 2: Convert to fraction form
    143,919.16/216,100.17 = 128,271.17/x
  3. Step 3: Cross multiply
    143,919.16x = 216,100.17 × 128,271.17
  4. Step 4: Simplify right side
    143,919.16x = 27,719,422,183.35
  5. Step 5: Solve for x
    x = 27,719,422,183.35/143,919.16
  6. Step 6: Final answer
    x = 192,604.12

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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.