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Finding the Fourth Proportional to 163,398.85, 225,476.92 and 90,803.88

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Solution

The fourth proportional to 163,398.85, 225,476.92 and 90,803.88 is: 125,301.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,398.85 : 225,476.92 = 90,803.88 : x
  2. Step 2: Convert to fraction form
    163,398.85/225,476.92 = 90,803.88/x
  3. Step 3: Cross multiply
    163,398.85x = 225,476.92 × 90,803.88
  4. Step 4: Simplify right side
    163,398.85x = 20,474,179,186.45
  5. Step 5: Solve for x
    x = 20,474,179,186.45/163,398.85
  6. Step 6: Final answer
    x = 125,301.86

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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.