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Finding the Fourth Proportional to 159,046.87, 219,489.74 and 87,429.91

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Solution

The fourth proportional to 159,046.87, 219,489.74 and 87,429.91 is: 120,656.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,046.87 : 219,489.74 = 87,429.91 : x
  2. Step 2: Convert to fraction form
    159,046.87/219,489.74 = 87,429.91/x
  3. Step 3: Cross multiply
    159,046.87x = 219,489.74 × 87,429.91
  4. Step 4: Simplify right side
    159,046.87x = 19,189,968,214.12
  5. Step 5: Solve for x
    x = 19,189,968,214.12/159,046.87
  6. Step 6: Final answer
    x = 120,656.06

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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.