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Finding the Fourth Proportional to 65,581.20, 98,396.64 and 39,304.80

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Solution

The fourth proportional to 65,581.20, 98,396.64 and 39,304.80 is: 58,972.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,581.20 : 98,396.64 = 39,304.80 : x
  2. Step 2: Convert to fraction form
    65,581.20/98,396.64 = 39,304.80/x
  3. Step 3: Cross multiply
    65,581.20x = 98,396.64 × 39,304.80
  4. Step 4: Simplify right side
    65,581.20x = 3,867,460,255.87
  5. Step 5: Solve for x
    x = 3,867,460,255.87/65,581.20
  6. Step 6: Final answer
    x = 58,972.09

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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.