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Finding the Fourth Proportional to 159,186.79, 219,709.02 and 91,249.30

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Solution

The fourth proportional to 159,186.79, 219,709.02 and 91,249.30 is: 125,941.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,186.79 : 219,709.02 = 91,249.30 : x
  2. Step 2: Convert to fraction form
    159,186.79/219,709.02 = 91,249.30/x
  3. Step 3: Cross multiply
    159,186.79x = 219,709.02 × 91,249.30
  4. Step 4: Simplify right side
    159,186.79x = 20,048,294,278.69
  5. Step 5: Solve for x
    x = 20,048,294,278.69/159,186.79
  6. Step 6: Final answer
    x = 125,941.95

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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.