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Finding the Fourth Proportional to 161,701.91, 221,532.42 and 155,641.42

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Solution

The fourth proportional to 161,701.91, 221,532.42 and 155,641.42 is: 213,229.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,701.91 : 221,532.42 = 155,641.42 : x
  2. Step 2: Convert to fraction form
    161,701.91/221,532.42 = 155,641.42/x
  3. Step 3: Cross multiply
    161,701.91x = 221,532.42 × 155,641.42
  4. Step 4: Simplify right side
    161,701.91x = 34,479,620,662.35
  5. Step 5: Solve for x
    x = 34,479,620,662.35/161,701.91
  6. Step 6: Final answer
    x = 213,229.51

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.