Home / 81,739.11-122,605.34-28,443.29

Finding the Fourth Proportional to 81,739.11, 122,605.34 and 28,443.29

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Solution

The fourth proportional to 81,739.11, 122,605.34 and 28,443.29 is: 42,663.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,739.11 : 122,605.34 = 28,443.29 : x
  2. Step 2: Convert to fraction form
    81,739.11/122,605.34 = 28,443.29/x
  3. Step 3: Cross multiply
    81,739.11x = 122,605.34 × 28,443.29
  4. Step 4: Simplify right side
    81,739.11x = 3,487,298,485.93
  5. Step 5: Solve for x
    x = 3,487,298,485.93/81,739.11
  6. Step 6: Final answer
    x = 42,663.77

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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.