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Finding the Fourth Proportional to 321,885.51, 482,773.56 and 85,252.11

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Solution

The fourth proportional to 321,885.51, 482,773.56 and 85,252.11 is: 127,863.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,885.51 : 482,773.56 = 85,252.11 : x
  2. Step 2: Convert to fraction form
    321,885.51/482,773.56 = 85,252.11/x
  3. Step 3: Cross multiply
    321,885.51x = 482,773.56 × 85,252.11
  4. Step 4: Simplify right side
    321,885.51x = 41,157,464,642.21
  5. Step 5: Solve for x
    x = 41,157,464,642.21/321,885.51
  6. Step 6: Final answer
    x = 127,863.68

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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.