Home / 81,253.11-121,920.68-36,851.55

Finding the Fourth Proportional to 81,253.11, 121,920.68 and 36,851.55

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Solution

The fourth proportional to 81,253.11, 121,920.68 and 36,851.55 is: 55,295.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,253.11 : 121,920.68 = 36,851.55 : x
  2. Step 2: Convert to fraction form
    81,253.11/121,920.68 = 36,851.55/x
  3. Step 3: Cross multiply
    81,253.11x = 121,920.68 × 36,851.55
  4. Step 4: Simplify right side
    81,253.11x = 4,492,966,035.05
  5. Step 5: Solve for x
    x = 4,492,966,035.05/81,253.11
  6. Step 6: Final answer
    x = 55,295.93

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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.