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Finding the Fourth Proportional to 159,387.83, 219,956.64 and 87,768.14

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Solution

The fourth proportional to 159,387.83, 219,956.64 and 87,768.14 is: 121,120.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,387.83 : 219,956.64 = 87,768.14 : x
  2. Step 2: Convert to fraction form
    159,387.83/219,956.64 = 87,768.14/x
  3. Step 3: Cross multiply
    159,387.83x = 219,956.64 × 87,768.14
  4. Step 4: Simplify right side
    159,387.83x = 19,305,185,173.45
  5. Step 5: Solve for x
    x = 19,305,185,173.45/159,387.83
  6. Step 6: Final answer
    x = 121,120.82

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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.