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Finding the Fourth Proportional to 69,165.72, 103,749.12 and 19,247.04

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Solution

The fourth proportional to 69,165.72, 103,749.12 and 19,247.04 is: 28,870.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,165.72 : 103,749.12 = 19,247.04 : x
  2. Step 2: Convert to fraction form
    69,165.72/103,749.12 = 19,247.04/x
  3. Step 3: Cross multiply
    69,165.72x = 103,749.12 × 19,247.04
  4. Step 4: Simplify right side
    69,165.72x = 1,996,863,462.60
  5. Step 5: Solve for x
    x = 1,996,863,462.60/69,165.72
  6. Step 6: Final answer
    x = 28,870.71

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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.