Home / 81,742.68-122,551.86-42,274.62

Finding the Fourth Proportional to 81,742.68, 122,551.86 and 42,274.62

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Solution

The fourth proportional to 81,742.68, 122,551.86 and 42,274.62 is: 63,379.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,742.68 : 122,551.86 = 42,274.62 : x
  2. Step 2: Convert to fraction form
    81,742.68/122,551.86 = 42,274.62/x
  3. Step 3: Cross multiply
    81,742.68x = 122,551.86 × 42,274.62
  4. Step 4: Simplify right side
    81,742.68x = 5,180,833,311.79
  5. Step 5: Solve for x
    x = 5,180,833,311.79/81,742.68
  6. Step 6: Final answer
    x = 63,379.78

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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.