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Finding the Fourth Proportional to 262,677.55, 394,071.68 and 85,170.72

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Solution

The fourth proportional to 262,677.55, 394,071.68 and 85,170.72 is: 127,774.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,677.55 : 394,071.68 = 85,170.72 : x
  2. Step 2: Convert to fraction form
    262,677.55/394,071.68 = 85,170.72/x
  3. Step 3: Cross multiply
    262,677.55x = 394,071.68 × 85,170.72
  4. Step 4: Simplify right side
    262,677.55x = 33,563,368,717.21
  5. Step 5: Solve for x
    x = 33,563,368,717.21/262,677.55
  6. Step 6: Final answer
    x = 127,774.03

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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.