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Finding the Fourth Proportional to 139,626.72, 192,679.20 and 75,964.48

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Solution

The fourth proportional to 139,626.72, 192,679.20 and 75,964.48 is: 104,827.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,626.72 : 192,679.20 = 75,964.48 : x
  2. Step 2: Convert to fraction form
    139,626.72/192,679.20 = 75,964.48/x
  3. Step 3: Cross multiply
    139,626.72x = 192,679.20 × 75,964.48
  4. Step 4: Simplify right side
    139,626.72x = 14,636,775,234.82
  5. Step 5: Solve for x
    x = 14,636,775,234.82/139,626.72
  6. Step 6: Final answer
    x = 104,827.90

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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.