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Finding the Fourth Proportional to 69,987.96, 104,865.06 and 49,174.20

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Solution

The fourth proportional to 69,987.96, 104,865.06 and 49,174.20 is: 73,679.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,987.96 : 104,865.06 = 49,174.20 : x
  2. Step 2: Convert to fraction form
    69,987.96/104,865.06 = 49,174.20/x
  3. Step 3: Cross multiply
    69,987.96x = 104,865.06 × 49,174.20
  4. Step 4: Simplify right side
    69,987.96x = 5,156,655,433.45
  5. Step 5: Solve for x
    x = 5,156,655,433.45/69,987.96
  6. Step 6: Final answer
    x = 73,679.18

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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.