Home / 81,078.57-121,617.86-25,670.25

Finding the Fourth Proportional to 81,078.57, 121,617.86 and 25,670.25

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Solution

The fourth proportional to 81,078.57, 121,617.86 and 25,670.25 is: 38,505.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,078.57 : 121,617.86 = 25,670.25 : x
  2. Step 2: Convert to fraction form
    81,078.57/121,617.86 = 25,670.25/x
  3. Step 3: Cross multiply
    81,078.57x = 121,617.86 × 25,670.25
  4. Step 4: Simplify right side
    81,078.57x = 3,121,960,742.31
  5. Step 5: Solve for x
    x = 3,121,960,742.31/81,078.57
  6. Step 6: Final answer
    x = 38,505.38

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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.