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Finding the Fourth Proportional to 70,999.17, 106,480.51 and 21,067.46

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Solution

The fourth proportional to 70,999.17, 106,480.51 and 21,067.46 is: 31,595.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,999.17 : 106,480.51 = 21,067.46 : x
  2. Step 2: Convert to fraction form
    70,999.17/106,480.51 = 21,067.46/x
  3. Step 3: Cross multiply
    70,999.17x = 106,480.51 × 21,067.46
  4. Step 4: Simplify right side
    70,999.17x = 2,243,273,885.20
  5. Step 5: Solve for x
    x = 2,243,273,885.20/70,999.17
  6. Step 6: Final answer
    x = 31,595.78

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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.