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Finding the Fourth Proportional to 67,996.80, 101,995.20 and 21,254.40

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Solution

The fourth proportional to 67,996.80, 101,995.20 and 21,254.40 is: 31,881.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,996.80 : 101,995.20 = 21,254.40 : x
  2. Step 2: Convert to fraction form
    67,996.80/101,995.20 = 21,254.40/x
  3. Step 3: Cross multiply
    67,996.80x = 101,995.20 × 21,254.40
  4. Step 4: Simplify right side
    67,996.80x = 2,167,846,778.88
  5. Step 5: Solve for x
    x = 2,167,846,778.88/67,996.80
  6. Step 6: Final answer
    x = 31,881.60

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1.5x scale

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.