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Finding the Fourth Proportional to 86,651.70, 119,515.32 and 54,789.90

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Solution

The fourth proportional to 86,651.70, 119,515.32 and 54,789.90 is: 75,569.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,651.70 : 119,515.32 = 54,789.90 : x
  2. Step 2: Convert to fraction form
    86,651.70/119,515.32 = 54,789.90/x
  3. Step 3: Cross multiply
    86,651.70x = 119,515.32 × 54,789.90
  4. Step 4: Simplify right side
    86,651.70x = 6,548,232,431.27
  5. Step 5: Solve for x
    x = 6,548,232,431.27/86,651.70
  6. Step 6: Final answer
    x = 75,569.58

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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.