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Finding the Fourth Proportional to 159,171.80, 219,688.29 and 91,234.31

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Solution

The fourth proportional to 159,171.80, 219,688.29 and 91,234.31 is: 125,921.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,171.80 : 219,688.29 = 91,234.31 : x
  2. Step 2: Convert to fraction form
    159,171.80/219,688.29 = 91,234.31/x
  3. Step 3: Cross multiply
    159,171.80x = 219,688.29 × 91,234.31
  4. Step 4: Simplify right side
    159,171.80x = 20,043,108,454.79
  5. Step 5: Solve for x
    x = 20,043,108,454.79/159,171.80
  6. Step 6: Final answer
    x = 125,921.23

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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.