Home / 81,146.11-121,520.42-67,019.71

Finding the Fourth Proportional to 81,146.11, 121,520.42 and 67,019.71

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Solution

The fourth proportional to 81,146.11, 121,520.42 and 67,019.71 is: 100,365.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,146.11 : 121,520.42 = 67,019.71 : x
  2. Step 2: Convert to fraction form
    81,146.11/121,520.42 = 67,019.71/x
  3. Step 3: Cross multiply
    81,146.11x = 121,520.42 × 67,019.71
  4. Step 4: Simplify right side
    81,146.11x = 8,144,263,307.48
  5. Step 5: Solve for x
    x = 8,144,263,307.48/81,146.11
  6. Step 6: Final answer
    x = 100,365.42

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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.