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Finding the Fourth Proportional to 139,367.70, 192,320.19 and 75,705.39

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Solution

The fourth proportional to 139,367.70, 192,320.19 and 75,705.39 is: 104,469.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,367.70 : 192,320.19 = 75,705.39 : x
  2. Step 2: Convert to fraction form
    139,367.70/192,320.19 = 75,705.39/x
  3. Step 3: Cross multiply
    139,367.70x = 192,320.19 × 75,705.39
  4. Step 4: Simplify right side
    139,367.70x = 14,559,674,988.82
  5. Step 5: Solve for x
    x = 14,559,674,988.82/139,367.70
  6. Step 6: Final answer
    x = 104,469.51

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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.