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Finding the Fourth Proportional to 156,171.96, 215,517 and 84,551.97

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Solution

The fourth proportional to 156,171.96, 215,517 and 84,551.97 is: 116,681.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,171.96 : 215,517 = 84,551.97 : x
  2. Step 2: Convert to fraction form
    156,171.96/215,517 = 84,551.97/x
  3. Step 3: Cross multiply
    156,171.96x = 215,517 × 84,551.97
  4. Step 4: Simplify right side
    156,171.96x = 18,222,386,918.49
  5. Step 5: Solve for x
    x = 18,222,386,918.49/156,171.96
  6. Step 6: Final answer
    x = 116,681.55

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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.