Home / 81,132.06-121,688.88-21,972.36

Finding the Fourth Proportional to 81,132.06, 121,688.88 and 21,972.36

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Solution

The fourth proportional to 81,132.06, 121,688.88 and 21,972.36 is: 32,956.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,132.06 : 121,688.88 = 21,972.36 : x
  2. Step 2: Convert to fraction form
    81,132.06/121,688.88 = 21,972.36/x
  3. Step 3: Cross multiply
    81,132.06x = 121,688.88 × 21,972.36
  4. Step 4: Simplify right side
    81,132.06x = 2,673,791,879.36
  5. Step 5: Solve for x
    x = 2,673,791,879.36/81,132.06
  6. Step 6: Final answer
    x = 32,956.05

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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.