Home / 78,821.56-118,231.09-36,678.07

Finding the Fourth Proportional to 78,821.56, 118,231.09 and 36,678.07

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Solution

The fourth proportional to 78,821.56, 118,231.09 and 36,678.07 is: 55,016.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,821.56 : 118,231.09 = 36,678.07 : x
  2. Step 2: Convert to fraction form
    78,821.56/118,231.09 = 36,678.07/x
  3. Step 3: Cross multiply
    78,821.56x = 118,231.09 × 36,678.07
  4. Step 4: Simplify right side
    78,821.56x = 4,336,488,195.20
  5. Step 5: Solve for x
    x = 4,336,488,195.20/78,821.56
  6. Step 6: Final answer
    x = 55,016.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.