Home / 83,621.78-125,431.57-20,442.46

Finding the Fourth Proportional to 83,621.78, 125,431.57 and 20,442.46

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Solution

The fourth proportional to 83,621.78, 125,431.57 and 20,442.46 is: 30,663.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,621.78 : 125,431.57 = 20,442.46 : x
  2. Step 2: Convert to fraction form
    83,621.78/125,431.57 = 20,442.46/x
  3. Step 3: Cross multiply
    83,621.78x = 125,431.57 × 20,442.46
  4. Step 4: Simplify right side
    83,621.78x = 2,564,129,852.46
  5. Step 5: Solve for x
    x = 2,564,129,852.46/83,621.78
  6. Step 6: Final answer
    x = 30,663.42

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1.5x scale

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.