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Finding the Fourth Proportional to 81,245.13, 121,870.95 and 25,080.27

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Solution

The fourth proportional to 81,245.13, 121,870.95 and 25,080.27 is: 37,621.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,245.13 : 121,870.95 = 25,080.27 : x
  2. Step 2: Convert to fraction form
    81,245.13/121,870.95 = 25,080.27/x
  3. Step 3: Cross multiply
    81,245.13x = 121,870.95 × 25,080.27
  4. Step 4: Simplify right side
    81,245.13x = 3,056,556,331.16
  5. Step 5: Solve for x
    x = 3,056,556,331.16/81,245.13
  6. Step 6: Final answer
    x = 37,621.41

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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.