Home / 78,415.83-117,629.01-25,825.77

Finding the Fourth Proportional to 78,415.83, 117,629.01 and 25,825.77

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Solution

The fourth proportional to 78,415.83, 117,629.01 and 25,825.77 is: 38,740.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,415.83 : 117,629.01 = 25,825.77 : x
  2. Step 2: Convert to fraction form
    78,415.83/117,629.01 = 25,825.77/x
  3. Step 3: Cross multiply
    78,415.83x = 117,629.01 × 25,825.77
  4. Step 4: Simplify right side
    78,415.83x = 3,037,859,757.59
  5. Step 5: Solve for x
    x = 3,037,859,757.59/78,415.83
  6. Step 6: Final answer
    x = 38,740.39

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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.