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Finding the Fourth Proportional to 79,119.70, 118,648.80 and 28,505.22

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Solution

The fourth proportional to 79,119.70, 118,648.80 and 28,505.22 is: 42,746.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,119.70 : 118,648.80 = 28,505.22 : x
  2. Step 2: Convert to fraction form
    79,119.70/118,648.80 = 28,505.22/x
  3. Step 3: Cross multiply
    79,119.70x = 118,648.80 × 28,505.22
  4. Step 4: Simplify right side
    79,119.70x = 3,382,110,146.74
  5. Step 5: Solve for x
    x = 3,382,110,146.74/79,119.70
  6. Step 6: Final answer
    x = 42,746.75

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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.