Home / 83,989.46-125,982.64-20,809.72

Finding the Fourth Proportional to 83,989.46, 125,982.64 and 20,809.72

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Solution

The fourth proportional to 83,989.46, 125,982.64 and 20,809.72 is: 31,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,989.46 : 125,982.64 = 20,809.72 : x
  2. Step 2: Convert to fraction form
    83,989.46/125,982.64 = 20,809.72/x
  3. Step 3: Cross multiply
    83,989.46x = 125,982.64 × 20,809.72
  4. Step 4: Simplify right side
    83,989.46x = 2,621,663,463.26
  5. Step 5: Solve for x
    x = 2,621,663,463.26/83,989.46
  6. Step 6: Final answer
    x = 31,214.20

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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.