Home / 78,986.48-109,008.79-43,181.78

Finding the Fourth Proportional to 78,986.48, 109,008.79 and 43,181.78

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Solution

The fourth proportional to 78,986.48, 109,008.79 and 43,181.78 is: 59,594.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,986.48 : 109,008.79 = 43,181.78 : x
  2. Step 2: Convert to fraction form
    78,986.48/109,008.79 = 43,181.78/x
  3. Step 3: Cross multiply
    78,986.48x = 109,008.79 × 43,181.78
  4. Step 4: Simplify right side
    78,986.48x = 4,707,192,934.85
  5. Step 5: Solve for x
    x = 4,707,192,934.85/78,986.48
  6. Step 6: Final answer
    x = 59,594.92

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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.