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Finding the Fourth Proportional to 103,993.20, 143,506.08 and 58,672.08

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Solution

The fourth proportional to 103,993.20, 143,506.08 and 58,672.08 is: 80,964.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,993.20 : 143,506.08 = 58,672.08 : x
  2. Step 2: Convert to fraction form
    103,993.20/143,506.08 = 58,672.08/x
  3. Step 3: Cross multiply
    103,993.20x = 143,506.08 × 58,672.08
  4. Step 4: Simplify right side
    103,993.20x = 8,419,800,206.25
  5. Step 5: Solve for x
    x = 8,419,800,206.25/103,993.20
  6. Step 6: Final answer
    x = 80,964.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.