Home / 81,231.66-121,808.75-47,507.18

Finding the Fourth Proportional to 81,231.66, 121,808.75 and 47,507.18

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Solution

The fourth proportional to 81,231.66, 121,808.75 and 47,507.18 is: 71,238.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,231.66 : 121,808.75 = 47,507.18 : x
  2. Step 2: Convert to fraction form
    81,231.66/121,808.75 = 47,507.18/x
  3. Step 3: Cross multiply
    81,231.66x = 121,808.75 × 47,507.18
  4. Step 4: Simplify right side
    81,231.66x = 5,786,789,365.25
  5. Step 5: Solve for x
    x = 5,786,789,365.25/81,231.66
  6. Step 6: Final answer
    x = 71,238.10

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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.