Home / 81,581.16-122,371.74-28,992.72

Finding the Fourth Proportional to 81,581.16, 122,371.74 and 28,992.72

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Solution

The fourth proportional to 81,581.16, 122,371.74 and 28,992.72 is: 43,489.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,581.16 : 122,371.74 = 28,992.72 : x
  2. Step 2: Convert to fraction form
    81,581.16/122,371.74 = 28,992.72/x
  3. Step 3: Cross multiply
    81,581.16x = 122,371.74 × 28,992.72
  4. Step 4: Simplify right side
    81,581.16x = 3,547,889,593.73
  5. Step 5: Solve for x
    x = 3,547,889,593.73/81,581.16
  6. Step 6: Final answer
    x = 43,489.08

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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.