Home / 86,515.20-129,878.10-49,101.30

Finding the Fourth Proportional to 86,515.20, 129,878.10 and 49,101.30

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Solution

The fourth proportional to 86,515.20, 129,878.10 and 49,101.30 is: 73,711.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,515.20 : 129,878.10 = 49,101.30 : x
  2. Step 2: Convert to fraction form
    86,515.20/129,878.10 = 49,101.30/x
  3. Step 3: Cross multiply
    86,515.20x = 129,878.10 × 49,101.30
  4. Step 4: Simplify right side
    86,515.20x = 6,377,183,551.53
  5. Step 5: Solve for x
    x = 6,377,183,551.53/86,515.20
  6. Step 6: Final answer
    x = 73,711.71

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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.