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Finding the Fourth Proportional to 67,836.80, 101,754.72 and 21,089.60

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Solution

The fourth proportional to 67,836.80, 101,754.72 and 21,089.60 is: 31,634.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,836.80 : 101,754.72 = 21,089.60 : x
  2. Step 2: Convert to fraction form
    67,836.80/101,754.72 = 21,089.60/x
  3. Step 3: Cross multiply
    67,836.80x = 101,754.72 × 21,089.60
  4. Step 4: Simplify right side
    67,836.80x = 2,145,966,342.91
  5. Step 5: Solve for x
    x = 2,145,966,342.91/67,836.80
  6. Step 6: Final answer
    x = 31,634.25

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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.