Home / 81,081.10-121,512.30-54,351.10

Finding the Fourth Proportional to 81,081.10, 121,512.30 and 54,351.10

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Solution

The fourth proportional to 81,081.10, 121,512.30 and 54,351.10 is: 81,453.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,081.10 : 121,512.30 = 54,351.10 : x
  2. Step 2: Convert to fraction form
    81,081.10/121,512.30 = 54,351.10/x
  3. Step 3: Cross multiply
    81,081.10x = 121,512.30 × 54,351.10
  4. Step 4: Simplify right side
    81,081.10x = 6,604,327,168.53
  5. Step 5: Solve for x
    x = 6,604,327,168.53/81,081.10
  6. Step 6: Final answer
    x = 81,453.35

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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.