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Finding the Fourth Proportional to 79,122.33, 118,652.74 and 28,507.86

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Solution

The fourth proportional to 79,122.33, 118,652.74 and 28,507.86 is: 42,750.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,122.33 : 118,652.74 = 28,507.86 : x
  2. Step 2: Convert to fraction form
    79,122.33/118,652.74 = 28,507.86/x
  3. Step 3: Cross multiply
    79,122.33x = 118,652.74 × 28,507.86
  4. Step 4: Simplify right side
    79,122.33x = 3,382,535,629.27
  5. Step 5: Solve for x
    x = 3,382,535,629.27/79,122.33
  6. Step 6: Final answer
    x = 42,750.71

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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.