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Finding the Fourth Proportional to 67,015.40, 100,515.90 and 17,767.40

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Solution

The fourth proportional to 67,015.40, 100,515.90 and 17,767.40 is: 26,649.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,015.40 : 100,515.90 = 17,767.40 : x
  2. Step 2: Convert to fraction form
    67,015.40/100,515.90 = 17,767.40/x
  3. Step 3: Cross multiply
    67,015.40x = 100,515.90 × 17,767.40
  4. Step 4: Simplify right side
    67,015.40x = 1,785,906,201.66
  5. Step 5: Solve for x
    x = 1,785,906,201.66/67,015.40
  6. Step 6: Final answer
    x = 26,649.19

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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.