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Finding the Fourth Proportional to 67,203.85, 92,702.68 and 42,009.61

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Solution

The fourth proportional to 67,203.85, 92,702.68 and 42,009.61 is: 57,949.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,203.85 : 92,702.68 = 42,009.61 : x
  2. Step 2: Convert to fraction form
    67,203.85/92,702.68 = 42,009.61/x
  3. Step 3: Cross multiply
    67,203.85x = 92,702.68 × 42,009.61
  4. Step 4: Simplify right side
    67,203.85x = 3,894,403,432.75
  5. Step 5: Solve for x
    x = 3,894,403,432.75/67,203.85
  6. Step 6: Final answer
    x = 57,949.11

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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.