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Finding the Fourth Proportional to 211,121.40, 316,601.91 and 68,932.92

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Solution

The fourth proportional to 211,121.40, 316,601.91 and 68,932.92 is: 103,373.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,121.40 : 316,601.91 = 68,932.92 : x
  2. Step 2: Convert to fraction form
    211,121.40/316,601.91 = 68,932.92/x
  3. Step 3: Cross multiply
    211,121.40x = 316,601.91 × 68,932.92
  4. Step 4: Simplify right side
    211,121.40x = 21,824,294,133.88
  5. Step 5: Solve for x
    x = 21,824,294,133.88/211,121.40
  6. Step 6: Final answer
    x = 103,373.20

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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.