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Finding the Fourth Proportional to 79,122.56, 118,765.85 and 53,009.78

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Solution

The fourth proportional to 79,122.56, 118,765.85 and 53,009.78 is: 79,569.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,122.56 : 118,765.85 = 53,009.78 : x
  2. Step 2: Convert to fraction form
    79,122.56/118,765.85 = 53,009.78/x
  3. Step 3: Cross multiply
    79,122.56x = 118,765.85 × 53,009.78
  4. Step 4: Simplify right side
    79,122.56x = 6,295,750,721.13
  5. Step 5: Solve for x
    x = 6,295,750,721.13/79,122.56
  6. Step 6: Final answer
    x = 79,569.61

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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.