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Finding the Fourth Proportional to 86,119.42, 118,848.84 and 47,879.59

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Solution

The fourth proportional to 86,119.42, 118,848.84 and 47,879.59 is: 66,076.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,119.42 : 118,848.84 = 47,879.59 : x
  2. Step 2: Convert to fraction form
    86,119.42/118,848.84 = 47,879.59/x
  3. Step 3: Cross multiply
    86,119.42x = 118,848.84 × 47,879.59
  4. Step 4: Simplify right side
    86,119.42x = 5,690,433,731.18
  5. Step 5: Solve for x
    x = 5,690,433,731.18/86,119.42
  6. Step 6: Final answer
    x = 66,076.08

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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.