Home / 81,715.16-122,606.78-42,281.12

Finding the Fourth Proportional to 81,715.16, 122,606.78 and 42,281.12

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Solution

The fourth proportional to 81,715.16, 122,606.78 and 42,281.12 is: 63,439.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,715.16 : 122,606.78 = 42,281.12 : x
  2. Step 2: Convert to fraction form
    81,715.16/122,606.78 = 42,281.12/x
  3. Step 3: Cross multiply
    81,715.16x = 122,606.78 × 42,281.12
  4. Step 4: Simplify right side
    81,715.16x = 5,183,951,977.99
  5. Step 5: Solve for x
    x = 5,183,951,977.99/81,715.16
  6. Step 6: Final answer
    x = 63,439.29

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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.