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Finding the Fourth Proportional to 139,353.80, 192,308.08 and 75,691.64

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Solution

The fourth proportional to 139,353.80, 192,308.08 and 75,691.64 is: 104,454.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,353.80 : 192,308.08 = 75,691.64 : x
  2. Step 2: Convert to fraction form
    139,353.80/192,308.08 = 75,691.64/x
  3. Step 3: Cross multiply
    139,353.80x = 192,308.08 × 75,691.64
  4. Step 4: Simplify right side
    139,353.80x = 14,556,113,960.45
  5. Step 5: Solve for x
    x = 14,556,113,960.45/139,353.80
  6. Step 6: Final answer
    x = 104,454.37

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1.5x scale

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.