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Finding the Fourth Proportional to 160,571.80, 221,589.92 and 90,721.41

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Solution

The fourth proportional to 160,571.80, 221,589.92 and 90,721.41 is: 125,196.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,571.80 : 221,589.92 = 90,721.41 : x
  2. Step 2: Convert to fraction form
    160,571.80/221,589.92 = 90,721.41/x
  3. Step 3: Cross multiply
    160,571.80x = 221,589.92 × 90,721.41
  4. Step 4: Simplify right side
    160,571.80x = 20,102,949,103.04
  5. Step 5: Solve for x
    x = 20,102,949,103.04/160,571.80
  6. Step 6: Final answer
    x = 125,196.02

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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.