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Finding the Fourth Proportional to 65,862.63, 98,803.56 and 21,478.48

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Solution

The fourth proportional to 65,862.63, 98,803.56 and 21,478.48 is: 32,220.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,862.63 : 98,803.56 = 21,478.48 : x
  2. Step 2: Convert to fraction form
    65,862.63/98,803.56 = 21,478.48/x
  3. Step 3: Cross multiply
    65,862.63x = 98,803.56 × 21,478.48
  4. Step 4: Simplify right side
    65,862.63x = 2,122,150,287.39
  5. Step 5: Solve for x
    x = 2,122,150,287.39/65,862.63
  6. Step 6: Final answer
    x = 32,220.86

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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.