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Finding the Fourth Proportional to 161,687.74, 221,513.26 and 155,627.30

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Solution

The fourth proportional to 161,687.74, 221,513.26 and 155,627.30 is: 213,210.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,687.74 : 221,513.26 = 155,627.30 : x
  2. Step 2: Convert to fraction form
    161,687.74/221,513.26 = 155,627.30/x
  3. Step 3: Cross multiply
    161,687.74x = 221,513.26 × 155,627.30
  4. Step 4: Simplify right side
    161,687.74x = 34,473,510,568.00
  5. Step 5: Solve for x
    x = 34,473,510,568.00/161,687.74
  6. Step 6: Final answer
    x = 213,210.42

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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.