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Finding the Fourth Proportional to 139,149.11, 192,025.71 and 75,486.90

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Solution

The fourth proportional to 139,149.11, 192,025.71 and 75,486.90 is: 104,171.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,149.11 : 192,025.71 = 75,486.90 : x
  2. Step 2: Convert to fraction form
    139,149.11/192,025.71 = 75,486.90/x
  3. Step 3: Cross multiply
    139,149.11x = 192,025.71 × 75,486.90
  4. Step 4: Simplify right side
    139,149.11x = 14,495,426,500.60
  5. Step 5: Solve for x
    x = 14,495,426,500.60/139,149.11
  6. Step 6: Final answer
    x = 104,171.90

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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.