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Finding the Fourth Proportional to 161,687.62, 221,513.08 and 155,627.17

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Solution

The fourth proportional to 161,687.62, 221,513.08 and 155,627.17 is: 213,210.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,687.62 : 221,513.08 = 155,627.17 : x
  2. Step 2: Convert to fraction form
    161,687.62/221,513.08 = 155,627.17/x
  3. Step 3: Cross multiply
    161,687.62x = 221,513.08 × 155,627.17
  4. Step 4: Simplify right side
    161,687.62x = 34,473,452,815.53
  5. Step 5: Solve for x
    x = 34,473,452,815.53/161,687.62
  6. Step 6: Final answer
    x = 213,210.22

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1.5x scale

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.