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Finding the Fourth Proportional to 86,261.43, 118,404.78 and 76,619.19

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Solution

The fourth proportional to 86,261.43, 118,404.78 and 76,619.19 is: 105,169.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,261.43 : 118,404.78 = 76,619.19 : x
  2. Step 2: Convert to fraction form
    86,261.43/118,404.78 = 76,619.19/x
  3. Step 3: Cross multiply
    86,261.43x = 118,404.78 × 76,619.19
  4. Step 4: Simplify right side
    86,261.43x = 9,072,078,335.73
  5. Step 5: Solve for x
    x = 9,072,078,335.73/86,261.43
  6. Step 6: Final answer
    x = 105,169.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.