Home / 207,784.19-311,816.40-81,408.58

Finding the Fourth Proportional to 207,784.19, 311,816.40 and 81,408.58

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Solution

The fourth proportional to 207,784.19, 311,816.40 and 81,408.58 is: 122,167.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,784.19 : 311,816.40 = 81,408.58 : x
  2. Step 2: Convert to fraction form
    207,784.19/311,816.40 = 81,408.58/x
  3. Step 3: Cross multiply
    207,784.19x = 311,816.40 × 81,408.58
  4. Step 4: Simplify right side
    207,784.19x = 25,384,530,344.71
  5. Step 5: Solve for x
    x = 25,384,530,344.71/207,784.19
  6. Step 6: Final answer
    x = 122,167.77

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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.