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Finding the Fourth Proportional to 143,808.16, 215,572.92 and 54,993.28

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Solution

The fourth proportional to 143,808.16, 215,572.92 and 54,993.28 is: 82,436.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,808.16 : 215,572.92 = 54,993.28 : x
  2. Step 2: Convert to fraction form
    143,808.16/215,572.92 = 54,993.28/x
  3. Step 3: Cross multiply
    143,808.16x = 215,572.92 × 54,993.28
  4. Step 4: Simplify right side
    143,808.16x = 11,855,061,949.98
  5. Step 5: Solve for x
    x = 11,855,061,949.98/143,808.16
  6. Step 6: Final answer
    x = 82,436.64

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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.