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Finding the Fourth Proportional to 73,458.72, 110,017.17 and 71,438.40

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Solution

The fourth proportional to 73,458.72, 110,017.17 and 71,438.40 is: 106,991.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,458.72 : 110,017.17 = 71,438.40 : x
  2. Step 2: Convert to fraction form
    73,458.72/110,017.17 = 71,438.40/x
  3. Step 3: Cross multiply
    73,458.72x = 110,017.17 × 71,438.40
  4. Step 4: Simplify right side
    73,458.72x = 7,859,450,597.33
  5. Step 5: Solve for x
    x = 7,859,450,597.33/73,458.72
  6. Step 6: Final answer
    x = 106,991.39

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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.