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Finding the Fourth Proportional to 78,745.58, 118,034.80 and 38,708.10

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Solution

The fourth proportional to 78,745.58, 118,034.80 and 38,708.10 is: 58,021.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,745.58 : 118,034.80 = 38,708.10 : x
  2. Step 2: Convert to fraction form
    78,745.58/118,034.80 = 38,708.10/x
  3. Step 3: Cross multiply
    78,745.58x = 118,034.80 × 38,708.10
  4. Step 4: Simplify right side
    78,745.58x = 4,568,902,841.88
  5. Step 5: Solve for x
    x = 4,568,902,841.88/78,745.58
  6. Step 6: Final answer
    x = 58,021.07

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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.