Home / 81,736.18-122,624.03-28,420.46

Finding the Fourth Proportional to 81,736.18, 122,624.03 and 28,420.46

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Solution

The fourth proportional to 81,736.18, 122,624.03 and 28,420.46 is: 42,637.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,736.18 : 122,624.03 = 28,420.46 : x
  2. Step 2: Convert to fraction form
    81,736.18/122,624.03 = 28,420.46/x
  3. Step 3: Cross multiply
    81,736.18x = 122,624.03 × 28,420.46
  4. Step 4: Simplify right side
    81,736.18x = 3,485,031,339.65
  5. Step 5: Solve for x
    x = 3,485,031,339.65/81,736.18
  6. Step 6: Final answer
    x = 42,637.56

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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.