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Finding the Fourth Proportional to 139,376.70, 192,332.61 and 75,714.39

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Solution

The fourth proportional to 139,376.70, 192,332.61 and 75,714.39 is: 104,481.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,376.70 : 192,332.61 = 75,714.39 : x
  2. Step 2: Convert to fraction form
    139,376.70/192,332.61 = 75,714.39/x
  3. Step 3: Cross multiply
    139,376.70x = 192,332.61 × 75,714.39
  4. Step 4: Simplify right side
    139,376.70x = 14,562,346,243.26
  5. Step 5: Solve for x
    x = 14,562,346,243.26/139,376.70
  6. Step 6: Final answer
    x = 104,481.93

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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.