Home / 66,781.32-100,156.26-19,383.90

Finding the Fourth Proportional to 66,781.32, 100,156.26 and 19,383.90

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Solution

The fourth proportional to 66,781.32, 100,156.26 and 19,383.90 is: 29,071.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,781.32 : 100,156.26 = 19,383.90 : x
  2. Step 2: Convert to fraction form
    66,781.32/100,156.26 = 19,383.90/x
  3. Step 3: Cross multiply
    66,781.32x = 100,156.26 × 19,383.90
  4. Step 4: Simplify right side
    66,781.32x = 1,941,418,928.21
  5. Step 5: Solve for x
    x = 1,941,418,928.21/66,781.32
  6. Step 6: Final answer
    x = 29,071.29

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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.