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Finding the Fourth Proportional to 65,119.20, 97,645.98 and 31,789.32

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Solution

The fourth proportional to 65,119.20, 97,645.98 and 31,789.32 is: 47,667.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,119.20 : 97,645.98 = 31,789.32 : x
  2. Step 2: Convert to fraction form
    65,119.20/97,645.98 = 31,789.32/x
  3. Step 3: Cross multiply
    65,119.20x = 97,645.98 × 31,789.32
  4. Step 4: Simplify right side
    65,119.20x = 3,104,099,304.93
  5. Step 5: Solve for x
    x = 3,104,099,304.93/65,119.20
  6. Step 6: Final answer
    x = 47,667.96

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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.