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Finding the Fourth Proportional to 159,382.76, 219,949.65 and 87,765.32

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Solution

The fourth proportional to 159,382.76, 219,949.65 and 87,765.32 is: 121,116.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,382.76 : 219,949.65 = 87,765.32 : x
  2. Step 2: Convert to fraction form
    159,382.76/219,949.65 = 87,765.32/x
  3. Step 3: Cross multiply
    159,382.76x = 219,949.65 × 87,765.32
  4. Step 4: Simplify right side
    159,382.76x = 19,303,951,416.14
  5. Step 5: Solve for x
    x = 19,303,951,416.14/159,382.76
  6. Step 6: Final answer
    x = 121,116.94

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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.