Home / 51,078.28-70,489.38-30,938.80

Finding the Fourth Proportional to 51,078.28, 70,489.38 and 30,938.80

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Solution

The fourth proportional to 51,078.28, 70,489.38 and 30,938.80 is: 42,696.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,078.28 : 70,489.38 = 30,938.80 : x
  2. Step 2: Convert to fraction form
    51,078.28/70,489.38 = 30,938.80/x
  3. Step 3: Cross multiply
    51,078.28x = 70,489.38 × 30,938.80
  4. Step 4: Simplify right side
    51,078.28x = 2,180,856,829.94
  5. Step 5: Solve for x
    x = 2,180,856,829.94/51,078.28
  6. Step 6: Final answer
    x = 42,696.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.