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Finding the Fourth Proportional to 210,791.62, 316,187.97 and 86,132.62

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Solution

The fourth proportional to 210,791.62, 316,187.97 and 86,132.62 is: 129,199.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,791.62 : 316,187.97 = 86,132.62 : x
  2. Step 2: Convert to fraction form
    210,791.62/316,187.97 = 86,132.62/x
  3. Step 3: Cross multiply
    210,791.62x = 316,187.97 × 86,132.62
  4. Step 4: Simplify right side
    210,791.62x = 27,234,098,268.58
  5. Step 5: Solve for x
    x = 27,234,098,268.58/210,791.62
  6. Step 6: Final answer
    x = 129,199.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.