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Finding the Fourth Proportional to 86,531.75, 119,467.86 and 66,349.85

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Solution

The fourth proportional to 86,531.75, 119,467.86 and 66,349.85 is: 91,604.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,531.75 : 119,467.86 = 66,349.85 : x
  2. Step 2: Convert to fraction form
    86,531.75/119,467.86 = 66,349.85/x
  3. Step 3: Cross multiply
    86,531.75x = 119,467.86 × 66,349.85
  4. Step 4: Simplify right side
    86,531.75x = 7,926,674,590.82
  5. Step 5: Solve for x
    x = 7,926,674,590.82/86,531.75
  6. Step 6: Final answer
    x = 91,604.24

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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.