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Finding the Fourth Proportional to 139,352.40, 192,308.40 and 75,691.44

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Solution

The fourth proportional to 139,352.40, 192,308.40 and 75,691.44 is: 104,455.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,352.40 : 192,308.40 = 75,691.44 : x
  2. Step 2: Convert to fraction form
    139,352.40/192,308.40 = 75,691.44/x
  3. Step 3: Cross multiply
    139,352.40x = 192,308.40 × 75,691.44
  4. Step 4: Simplify right side
    139,352.40x = 14,556,099,720.10
  5. Step 5: Solve for x
    x = 14,556,099,720.10/139,352.40
  6. Step 6: Final answer
    x = 104,455.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.