Home / 81,617.40-122,538.42-42,201.72

Finding the Fourth Proportional to 81,617.40, 122,538.42 and 42,201.72

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Solution

The fourth proportional to 81,617.40, 122,538.42 and 42,201.72 is: 63,360.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,617.40 : 122,538.42 = 42,201.72 : x
  2. Step 2: Convert to fraction form
    81,617.40/122,538.42 = 42,201.72/x
  3. Step 3: Cross multiply
    81,617.40x = 122,538.42 × 42,201.72
  4. Step 4: Simplify right side
    81,617.40x = 5,171,332,090.08
  5. Step 5: Solve for x
    x = 5,171,332,090.08/81,617.40
  6. Step 6: Final answer
    x = 63,360.66

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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.