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Finding the Fourth Proportional to 211,085.44, 316,626.17 and 91,227.13

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Solution

The fourth proportional to 211,085.44, 316,626.17 and 91,227.13 is: 136,839.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,085.44 : 316,626.17 = 91,227.13 : x
  2. Step 2: Convert to fraction form
    211,085.44/316,626.17 = 91,227.13/x
  3. Step 3: Cross multiply
    211,085.44x = 316,626.17 × 91,227.13
  4. Step 4: Simplify right side
    211,085.44x = 28,884,896,771.99
  5. Step 5: Solve for x
    x = 28,884,896,771.99/211,085.44
  6. Step 6: Final answer
    x = 136,839.83

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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.