Home / 81,312.66-121,991.06-33,912.07

Finding the Fourth Proportional to 81,312.66, 121,991.06 and 33,912.07

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Solution

The fourth proportional to 81,312.66, 121,991.06 and 33,912.07 is: 50,877.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,312.66 : 121,991.06 = 33,912.07 : x
  2. Step 2: Convert to fraction form
    81,312.66/121,991.06 = 33,912.07/x
  3. Step 3: Cross multiply
    81,312.66x = 121,991.06 × 33,912.07
  4. Step 4: Simplify right side
    81,312.66x = 4,136,969,145.90
  5. Step 5: Solve for x
    x = 4,136,969,145.90/81,312.66
  6. Step 6: Final answer
    x = 50,877.31

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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.