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Finding the Fourth Proportional to 67,997.80, 101,996.70 and 21,255.40

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Solution

The fourth proportional to 67,997.80, 101,996.70 and 21,255.40 is: 31,883.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,997.80 : 101,996.70 = 21,255.40 : x
  2. Step 2: Convert to fraction form
    67,997.80/101,996.70 = 21,255.40/x
  3. Step 3: Cross multiply
    67,997.80x = 101,996.70 × 21,255.40
  4. Step 4: Simplify right side
    67,997.80x = 2,167,980,657.18
  5. Step 5: Solve for x
    x = 2,167,980,657.18/67,997.80
  6. Step 6: Final answer
    x = 31,883.10

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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.