Home / 81,015.57-121,523.38-21,851.26

Finding the Fourth Proportional to 81,015.57, 121,523.38 and 21,851.26

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Solution

The fourth proportional to 81,015.57, 121,523.38 and 21,851.26 is: 32,776.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,015.57 : 121,523.38 = 21,851.26 : x
  2. Step 2: Convert to fraction form
    81,015.57/121,523.38 = 21,851.26/x
  3. Step 3: Cross multiply
    81,015.57x = 121,523.38 × 21,851.26
  4. Step 4: Simplify right side
    81,015.57x = 2,655,438,614.02
  5. Step 5: Solve for x
    x = 2,655,438,614.02/81,015.57
  6. Step 6: Final answer
    x = 32,776.89

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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.