Home / 83,275.11-124,907.81-20,940.75

Finding the Fourth Proportional to 83,275.11, 124,907.81 and 20,940.75

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Solution

The fourth proportional to 83,275.11, 124,907.81 and 20,940.75 is: 31,409.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,275.11 : 124,907.81 = 20,940.75 : x
  2. Step 2: Convert to fraction form
    83,275.11/124,907.81 = 20,940.75/x
  3. Step 3: Cross multiply
    83,275.11x = 124,907.81 × 20,940.75
  4. Step 4: Simplify right side
    83,275.11x = 2,615,663,117.55
  5. Step 5: Solve for x
    x = 2,615,663,117.55/83,275.11
  6. Step 6: Final answer
    x = 31,409.90

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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.