Home / 82,715.20-124,072.80-53,190.70

Finding the Fourth Proportional to 82,715.20, 124,072.80 and 53,190.70

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Solution

The fourth proportional to 82,715.20, 124,072.80 and 53,190.70 is: 79,786.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,715.20 : 124,072.80 = 53,190.70 : x
  2. Step 2: Convert to fraction form
    82,715.20/124,072.80 = 53,190.70/x
  3. Step 3: Cross multiply
    82,715.20x = 124,072.80 × 53,190.70
  4. Step 4: Simplify right side
    82,715.20x = 6,599,519,082.96
  5. Step 5: Solve for x
    x = 6,599,519,082.96/82,715.20
  6. Step 6: Final answer
    x = 79,786.05

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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.