Home / 81,147.12-121,709.31-27,838.21

Finding the Fourth Proportional to 81,147.12, 121,709.31 and 27,838.21

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Solution

The fourth proportional to 81,147.12, 121,709.31 and 27,838.21 is: 41,753.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,147.12 : 121,709.31 = 27,838.21 : x
  2. Step 2: Convert to fraction form
    81,147.12/121,709.31 = 27,838.21/x
  3. Step 3: Cross multiply
    81,147.12x = 121,709.31 × 27,838.21
  4. Step 4: Simplify right side
    81,147.12x = 3,388,168,886.26
  5. Step 5: Solve for x
    x = 3,388,168,886.26/81,147.12
  6. Step 6: Final answer
    x = 41,753.41

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1.5x scale

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.