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Finding the Fourth Proportional to 65,963.88, 98,956.20 and 21,580.20

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Solution

The fourth proportional to 65,963.88, 98,956.20 and 21,580.20 is: 32,373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,963.88 : 98,956.20 = 21,580.20 : x
  2. Step 2: Convert to fraction form
    65,963.88/98,956.20 = 21,580.20/x
  3. Step 3: Cross multiply
    65,963.88x = 98,956.20 × 21,580.20
  4. Step 4: Simplify right side
    65,963.88x = 2,135,494,587.24
  5. Step 5: Solve for x
    x = 2,135,494,587.24/65,963.88
  6. Step 6: Final answer
    x = 32,373.70

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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.