Home / 78,385.14-117,552.87-25,782.39

Finding the Fourth Proportional to 78,385.14, 117,552.87 and 25,782.39

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Solution

The fourth proportional to 78,385.14, 117,552.87 and 25,782.39 is: 38,665.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,385.14 : 117,552.87 = 25,782.39 : x
  2. Step 2: Convert to fraction form
    78,385.14/117,552.87 = 25,782.39/x
  3. Step 3: Cross multiply
    78,385.14x = 117,552.87 × 25,782.39
  4. Step 4: Simplify right side
    78,385.14x = 3,030,793,939.96
  5. Step 5: Solve for x
    x = 3,030,793,939.96/78,385.14
  6. Step 6: Final answer
    x = 38,665.41

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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.