Home / 81,212.12-121,801.44-31,275.08

Finding the Fourth Proportional to 81,212.12, 121,801.44 and 31,275.08

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Solution

The fourth proportional to 81,212.12, 121,801.44 and 31,275.08 is: 46,906.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,212.12 : 121,801.44 = 31,275.08 : x
  2. Step 2: Convert to fraction form
    81,212.12/121,801.44 = 31,275.08/x
  3. Step 3: Cross multiply
    81,212.12x = 121,801.44 × 31,275.08
  4. Step 4: Simplify right side
    81,212.12x = 3,809,349,780.12
  5. Step 5: Solve for x
    x = 3,809,349,780.12/81,212.12
  6. Step 6: Final answer
    x = 46,906.17

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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.