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Finding the Fourth Proportional to 139,146.87, 192,023.16 and 75,485.12

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Solution

The fourth proportional to 139,146.87, 192,023.16 and 75,485.12 is: 104,169.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,146.87 : 192,023.16 = 75,485.12 : x
  2. Step 2: Convert to fraction form
    139,146.87/192,023.16 = 75,485.12/x
  3. Step 3: Cross multiply
    139,146.87x = 192,023.16 × 75,485.12
  4. Step 4: Simplify right side
    139,146.87x = 14,494,891,275.38
  5. Step 5: Solve for x
    x = 14,494,891,275.38/139,146.87
  6. Step 6: Final answer
    x = 104,169.73

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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.