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Finding the Fourth Proportional to 68,243.61, 102,733.90 and 61,377.40

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Solution

The fourth proportional to 68,243.61, 102,733.90 and 61,377.40 is: 92,397.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,243.61 : 102,733.90 = 61,377.40 : x
  2. Step 2: Convert to fraction form
    68,243.61/102,733.90 = 61,377.40/x
  3. Step 3: Cross multiply
    68,243.61x = 102,733.90 × 61,377.40
  4. Step 4: Simplify right side
    68,243.61x = 6,305,539,416.20
  5. Step 5: Solve for x
    x = 6,305,539,416.20/68,243.61
  6. Step 6: Final answer
    x = 92,397.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.