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Finding the Fourth Proportional to 65,480.70, 98,220.92 and 21,114.02

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Solution

The fourth proportional to 65,480.70, 98,220.92 and 21,114.02 is: 31,670.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,480.70 : 98,220.92 = 21,114.02 : x
  2. Step 2: Convert to fraction form
    65,480.70/98,220.92 = 21,114.02/x
  3. Step 3: Cross multiply
    65,480.70x = 98,220.92 × 21,114.02
  4. Step 4: Simplify right side
    65,480.70x = 2,073,838,469.30
  5. Step 5: Solve for x
    x = 2,073,838,469.30/65,480.70
  6. Step 6: Final answer
    x = 31,670.99

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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.