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Finding the Fourth Proportional to 159,379.37, 219,944.34 and 91,398.91

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Solution

The fourth proportional to 159,379.37, 219,944.34 and 91,398.91 is: 126,130.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,379.37 : 219,944.34 = 91,398.91 : x
  2. Step 2: Convert to fraction form
    159,379.37/219,944.34 = 91,398.91/x
  3. Step 3: Cross multiply
    159,379.37x = 219,944.34 × 91,398.91
  4. Step 4: Simplify right side
    159,379.37x = 20,102,671,836.95
  5. Step 5: Solve for x
    x = 20,102,671,836.95/159,379.37
  6. Step 6: Final answer
    x = 126,130.95

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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.