Home / 91,721.71-126,578.73-51,439.20

Finding the Fourth Proportional to 91,721.71, 126,578.73 and 51,439.20

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Solution

The fourth proportional to 91,721.71, 126,578.73 and 51,439.20 is: 70,987.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,721.71 : 126,578.73 = 51,439.20 : x
  2. Step 2: Convert to fraction form
    91,721.71/126,578.73 = 51,439.20/x
  3. Step 3: Cross multiply
    91,721.71x = 126,578.73 × 51,439.20
  4. Step 4: Simplify right side
    91,721.71x = 6,511,108,608.22
  5. Step 5: Solve for x
    x = 6,511,108,608.22/91,721.71
  6. Step 6: Final answer
    x = 70,987.65

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1.5x scale

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.