Home / 81,083.13-121,631.18-28,504.41

Finding the Fourth Proportional to 81,083.13, 121,631.18 and 28,504.41

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Solution

The fourth proportional to 81,083.13, 121,631.18 and 28,504.41 is: 42,758.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,083.13 : 121,631.18 = 28,504.41 : x
  2. Step 2: Convert to fraction form
    81,083.13/121,631.18 = 28,504.41/x
  3. Step 3: Cross multiply
    81,083.13x = 121,631.18 × 28,504.41
  4. Step 4: Simplify right side
    81,083.13x = 3,467,024,880.98
  5. Step 5: Solve for x
    x = 3,467,024,880.98/81,083.13
  6. Step 6: Final answer
    x = 42,758.89

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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.