Home / 81,721.80-122,549.04-25,542.72

Finding the Fourth Proportional to 81,721.80, 122,549.04 and 25,542.72

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Solution

The fourth proportional to 81,721.80, 122,549.04 and 25,542.72 is: 38,303.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,721.80 : 122,549.04 = 25,542.72 : x
  2. Step 2: Convert to fraction form
    81,721.80/122,549.04 = 25,542.72/x
  3. Step 3: Cross multiply
    81,721.80x = 122,549.04 × 25,542.72
  4. Step 4: Simplify right side
    81,721.80x = 3,130,235,814.99
  5. Step 5: Solve for x
    x = 3,130,235,814.99/81,721.80
  6. Step 6: Final answer
    x = 38,303.56

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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.