Home / 81,813.23-122,810.96-42,359.75

Finding the Fourth Proportional to 81,813.23, 122,810.96 and 42,359.75

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Solution

The fourth proportional to 81,813.23, 122,810.96 and 42,359.75 is: 63,586.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,813.23 : 122,810.96 = 42,359.75 : x
  2. Step 2: Convert to fraction form
    81,813.23/122,810.96 = 42,359.75/x
  3. Step 3: Cross multiply
    81,813.23x = 122,810.96 × 42,359.75
  4. Step 4: Simplify right side
    81,813.23x = 5,202,241,562.86
  5. Step 5: Solve for x
    x = 5,202,241,562.86/81,813.23
  6. Step 6: Final answer
    x = 63,586.80

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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.