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Finding the Fourth Proportional to 139,688.72, 192,770.43 and 76,026.97

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Solution

The fourth proportional to 139,688.72, 192,770.43 and 76,026.97 is: 104,917.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,688.72 : 192,770.43 = 76,026.97 : x
  2. Step 2: Convert to fraction form
    139,688.72/192,770.43 = 76,026.97/x
  3. Step 3: Cross multiply
    139,688.72x = 192,770.43 × 76,026.97
  4. Step 4: Simplify right side
    139,688.72x = 14,655,752,082.01
  5. Step 5: Solve for x
    x = 14,655,752,082.01/139,688.72
  6. Step 6: Final answer
    x = 104,917.22

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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.