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Finding the Fourth Proportional to 52,750.80, 79,128.75 and 17,212.05

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Solution

The fourth proportional to 52,750.80, 79,128.75 and 17,212.05 is: 25,818.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,750.80 : 79,128.75 = 17,212.05 : x
  2. Step 2: Convert to fraction form
    52,750.80/79,128.75 = 17,212.05/x
  3. Step 3: Cross multiply
    52,750.80x = 79,128.75 × 17,212.05
  4. Step 4: Simplify right side
    52,750.80x = 1,361,968,001.44
  5. Step 5: Solve for x
    x = 1,361,968,001.44/52,750.80
  6. Step 6: Final answer
    x = 25,818.91

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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.