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Finding the Fourth Proportional to 70,943.76, 106,414.92 and 21,024.24

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Solution

The fourth proportional to 70,943.76, 106,414.92 and 21,024.24 is: 31,536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,943.76 : 106,414.92 = 21,024.24 : x
  2. Step 2: Convert to fraction form
    70,943.76/106,414.92 = 21,024.24/x
  3. Step 3: Cross multiply
    70,943.76x = 106,414.92 × 21,024.24
  4. Step 4: Simplify right side
    70,943.76x = 2,237,292,817.66
  5. Step 5: Solve for x
    x = 2,237,292,817.66/70,943.76
  6. Step 6: Final answer
    x = 31,536.15

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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.