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Finding the Fourth Proportional to 86,119.66, 118,849.19 and 47,879.84

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Solution

The fourth proportional to 86,119.66, 118,849.19 and 47,879.84 is: 66,076.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,119.66 : 118,849.19 = 47,879.84 : x
  2. Step 2: Convert to fraction form
    86,119.66/118,849.19 = 47,879.84/x
  3. Step 3: Cross multiply
    86,119.66x = 118,849.19 × 47,879.84
  4. Step 4: Simplify right side
    86,119.66x = 5,690,480,259.05
  5. Step 5: Solve for x
    x = 5,690,480,259.05/86,119.66
  6. Step 6: Final answer
    x = 66,076.44

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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.