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Finding the Fourth Proportional to 70,987.80, 106,481.70 and 53,273.10

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Solution

The fourth proportional to 70,987.80, 106,481.70 and 53,273.10 is: 79,909.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,987.80 : 106,481.70 = 53,273.10 : x
  2. Step 2: Convert to fraction form
    70,987.80/106,481.70 = 53,273.10/x
  3. Step 3: Cross multiply
    70,987.80x = 106,481.70 × 53,273.10
  4. Step 4: Simplify right side
    70,987.80x = 5,672,610,252.27
  5. Step 5: Solve for x
    x = 5,672,610,252.27/70,987.80
  6. Step 6: Final answer
    x = 79,909.65

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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.