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Finding the Fourth Proportional to 70,212.74, 105,308.73 and 25,829.11

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Solution

The fourth proportional to 70,212.74, 105,308.73 and 25,829.11 is: 38,739.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,212.74 : 105,308.73 = 25,829.11 : x
  2. Step 2: Convert to fraction form
    70,212.74/105,308.73 = 25,829.11/x
  3. Step 3: Cross multiply
    70,212.74x = 105,308.73 × 25,829.11
  4. Step 4: Simplify right side
    70,212.74x = 2,720,031,174.73
  5. Step 5: Solve for x
    x = 2,720,031,174.73/70,212.74
  6. Step 6: Final answer
    x = 38,739.85

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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.