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Finding the Fourth Proportional to 210,791.12, 316,187.22 and 86,132.12

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Solution

The fourth proportional to 210,791.12, 316,187.22 and 86,132.12 is: 129,198.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,791.12 : 316,187.22 = 86,132.12 : x
  2. Step 2: Convert to fraction form
    210,791.12/316,187.22 = 86,132.12/x
  3. Step 3: Cross multiply
    210,791.12x = 316,187.22 × 86,132.12
  4. Step 4: Simplify right side
    210,791.12x = 27,233,875,575.51
  5. Step 5: Solve for x
    x = 27,233,875,575.51/210,791.12
  6. Step 6: Final answer
    x = 129,198.40

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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.