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Finding the Fourth Proportional to 139,354.04, 192,309.60 and 75,691.88

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Solution

The fourth proportional to 139,354.04, 192,309.60 and 75,691.88 is: 104,455.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,354.04 : 192,309.60 = 75,691.88 : x
  2. Step 2: Convert to fraction form
    139,354.04/192,309.60 = 75,691.88/x
  3. Step 3: Cross multiply
    139,354.04x = 192,309.60 × 75,691.88
  4. Step 4: Simplify right side
    139,354.04x = 14,556,275,166.05
  5. Step 5: Solve for x
    x = 14,556,275,166.05/139,354.04
  6. Step 6: Final answer
    x = 104,455.35

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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.