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Finding the Fourth Proportional to 163,420.85, 225,496.21 and 91,787.15

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Solution

The fourth proportional to 163,420.85, 225,496.21 and 91,787.15 is: 126,652.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,420.85 : 225,496.21 = 91,787.15 : x
  2. Step 2: Convert to fraction form
    163,420.85/225,496.21 = 91,787.15/x
  3. Step 3: Cross multiply
    163,420.85x = 225,496.21 × 91,787.15
  4. Step 4: Simplify right side
    163,420.85x = 20,697,654,451.70
  5. Step 5: Solve for x
    x = 20,697,654,451.70/163,420.85
  6. Step 6: Final answer
    x = 126,652.47

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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.