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Finding the Fourth Proportional to 65,839.20, 98,758.80 and 54,029.40

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Solution

The fourth proportional to 65,839.20, 98,758.80 and 54,029.40 is: 81,044.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,839.20 : 98,758.80 = 54,029.40 : x
  2. Step 2: Convert to fraction form
    65,839.20/98,758.80 = 54,029.40/x
  3. Step 3: Cross multiply
    65,839.20x = 98,758.80 × 54,029.40
  4. Step 4: Simplify right side
    65,839.20x = 5,335,878,708.72
  5. Step 5: Solve for x
    x = 5,335,878,708.72/65,839.20
  6. Step 6: Final answer
    x = 81,044.10

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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.