Home / 86,155.25-118,879.75-47,909.78

Finding the Fourth Proportional to 86,155.25, 118,879.75 and 47,909.78

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Solution

The fourth proportional to 86,155.25, 118,879.75 and 47,909.78 is: 66,107.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,155.25 : 118,879.75 = 47,909.78 : x
  2. Step 2: Convert to fraction form
    86,155.25/118,879.75 = 47,909.78/x
  3. Step 3: Cross multiply
    86,155.25x = 118,879.75 × 47,909.78
  4. Step 4: Simplify right side
    86,155.25x = 5,695,502,580.24
  5. Step 5: Solve for x
    x = 5,695,502,580.24/86,155.25
  6. Step 6: Final answer
    x = 66,107.44

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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.