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Finding the Fourth Proportional to 65,987.88, 98,972.84 and 21,609.34

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Solution

The fourth proportional to 65,987.88, 98,972.84 and 21,609.34 is: 32,411.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,987.88 : 98,972.84 = 21,609.34 : x
  2. Step 2: Convert to fraction form
    65,987.88/98,972.84 = 21,609.34/x
  3. Step 3: Cross multiply
    65,987.88x = 98,972.84 × 21,609.34
  4. Step 4: Simplify right side
    65,987.88x = 2,138,737,750.33
  5. Step 5: Solve for x
    x = 2,138,737,750.33/65,987.88
  6. Step 6: Final answer
    x = 32,411.07

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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.