Home / 81,311.13-121,981.68-36,941.22

Finding the Fourth Proportional to 81,311.13, 121,981.68 and 36,941.22

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Solution

The fourth proportional to 81,311.13, 121,981.68 and 36,941.22 is: 55,418.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,311.13 : 121,981.68 = 36,941.22 : x
  2. Step 2: Convert to fraction form
    81,311.13/121,981.68 = 36,941.22/x
  3. Step 3: Cross multiply
    81,311.13x = 121,981.68 × 36,941.22
  4. Step 4: Simplify right side
    81,311.13x = 4,506,152,076.85
  5. Step 5: Solve for x
    x = 4,506,152,076.85/81,311.13
  6. Step 6: Final answer
    x = 55,418.64

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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.