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Finding the Fourth Proportional to 65,803.52, 98,711.56 and 18,418.64

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Solution

The fourth proportional to 65,803.52, 98,711.56 and 18,418.64 is: 27,629.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,803.52 : 98,711.56 = 18,418.64 : x
  2. Step 2: Convert to fraction form
    65,803.52/98,711.56 = 18,418.64/x
  3. Step 3: Cross multiply
    65,803.52x = 98,711.56 × 18,418.64
  4. Step 4: Simplify right side
    65,803.52x = 1,818,132,687.48
  5. Step 5: Solve for x
    x = 1,818,132,687.48/65,803.52
  6. Step 6: Final answer
    x = 27,629.72

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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.