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Finding the Fourth Proportional to 268,491.56, 402,728.19 and 68,813.91

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Solution

The fourth proportional to 268,491.56, 402,728.19 and 68,813.91 is: 103,218.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,491.56 : 402,728.19 = 68,813.91 : x
  2. Step 2: Convert to fraction form
    268,491.56/402,728.19 = 68,813.91/x
  3. Step 3: Cross multiply
    268,491.56x = 402,728.19 × 68,813.91
  4. Step 4: Simplify right side
    268,491.56x = 27,713,301,421.12
  5. Step 5: Solve for x
    x = 27,713,301,421.12/268,491.56
  6. Step 6: Final answer
    x = 103,218.52

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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.