Home / 78,507.12-117,760.71-19,342.80

Finding the Fourth Proportional to 78,507.12, 117,760.71 and 19,342.80

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Solution

The fourth proportional to 78,507.12, 117,760.71 and 19,342.80 is: 29,014.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,507.12 : 117,760.71 = 19,342.80 : x
  2. Step 2: Convert to fraction form
    78,507.12/117,760.71 = 19,342.80/x
  3. Step 3: Cross multiply
    78,507.12x = 117,760.71 × 19,342.80
  4. Step 4: Simplify right side
    78,507.12x = 2,277,821,879.52
  5. Step 5: Solve for x
    x = 2,277,821,879.52/78,507.12
  6. Step 6: Final answer
    x = 29,014.21

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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.