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Finding the Fourth Proportional to 86,118.86, 118,848.07 and 47,879.03

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Solution

The fourth proportional to 86,118.86, 118,848.07 and 47,879.03 is: 66,075.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,118.86 : 118,848.07 = 47,879.03 : x
  2. Step 2: Convert to fraction form
    86,118.86/118,848.07 = 47,879.03/x
  3. Step 3: Cross multiply
    86,118.86x = 118,848.07 × 47,879.03
  4. Step 4: Simplify right side
    86,118.86x = 5,690,330,308.97
  5. Step 5: Solve for x
    x = 5,690,330,308.97/86,118.86
  6. Step 6: Final answer
    x = 66,075.31

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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.