Home / 81,083.20-121,567.20-36,731.20

Finding the Fourth Proportional to 81,083.20, 121,567.20 and 36,731.20

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Solution

The fourth proportional to 81,083.20, 121,567.20 and 36,731.20 is: 55,070.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,083.20 : 121,567.20 = 36,731.20 : x
  2. Step 2: Convert to fraction form
    81,083.20/121,567.20 = 36,731.20/x
  3. Step 3: Cross multiply
    81,083.20x = 121,567.20 × 36,731.20
  4. Step 4: Simplify right side
    81,083.20x = 4,465,309,136.64
  5. Step 5: Solve for x
    x = 4,465,309,136.64/81,083.20
  6. Step 6: Final answer
    x = 55,070.71

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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.