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Finding the Fourth Proportional to 68,411.50, 94,407.87 and 38,603.50

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Solution

The fourth proportional to 68,411.50, 94,407.87 and 38,603.50 is: 53,272.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,411.50 : 94,407.87 = 38,603.50 : x
  2. Step 2: Convert to fraction form
    68,411.50/94,407.87 = 38,603.50/x
  3. Step 3: Cross multiply
    68,411.50x = 94,407.87 × 38,603.50
  4. Step 4: Simplify right side
    68,411.50x = 3,644,474,209.55
  5. Step 5: Solve for x
    x = 3,644,474,209.55/68,411.50
  6. Step 6: Final answer
    x = 53,272.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.