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Finding the Fourth Proportional to 69,369.76, 104,070 and 38,188.96

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Solution

The fourth proportional to 69,369.76, 104,070 and 38,188.96 is: 57,291.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,369.76 : 104,070 = 38,188.96 : x
  2. Step 2: Convert to fraction form
    69,369.76/104,070 = 38,188.96/x
  3. Step 3: Cross multiply
    69,369.76x = 104,070 × 38,188.96
  4. Step 4: Simplify right side
    69,369.76x = 3,974,325,067.20
  5. Step 5: Solve for x
    x = 3,974,325,067.20/69,369.76
  6. Step 6: Final answer
    x = 57,291.90

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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.