Home / 81,266.30-121,911.10-25,111.31

Finding the Fourth Proportional to 81,266.30, 121,911.10 and 25,111.31

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Solution

The fourth proportional to 81,266.30, 121,911.10 and 25,111.31 is: 37,670.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,266.30 : 121,911.10 = 25,111.31 : x
  2. Step 2: Convert to fraction form
    81,266.30/121,911.10 = 25,111.31/x
  3. Step 3: Cross multiply
    81,266.30x = 121,911.10 × 25,111.31
  4. Step 4: Simplify right side
    81,266.30x = 3,061,346,752.21
  5. Step 5: Solve for x
    x = 3,061,346,752.21/81,266.30
  6. Step 6: Final answer
    x = 37,670.56

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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.