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Finding the Fourth Proportional to 70,819.88, 106,248.02 and 20,897.96

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Solution

The fourth proportional to 70,819.88, 106,248.02 and 20,897.96 is: 31,352.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,819.88 : 106,248.02 = 20,897.96 : x
  2. Step 2: Convert to fraction form
    70,819.88/106,248.02 = 20,897.96/x
  3. Step 3: Cross multiply
    70,819.88x = 106,248.02 × 20,897.96
  4. Step 4: Simplify right side
    70,819.88x = 2,220,366,872.04
  5. Step 5: Solve for x
    x = 2,220,366,872.04/70,819.88
  6. Step 6: Final answer
    x = 31,352.31

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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.