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Finding the Fourth Proportional to 88,705.76, 122,414.06 and 56,874.66

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Solution

The fourth proportional to 88,705.76, 122,414.06 and 56,874.66 is: 78,487.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,705.76 : 122,414.06 = 56,874.66 : x
  2. Step 2: Convert to fraction form
    88,705.76/122,414.06 = 56,874.66/x
  3. Step 3: Cross multiply
    88,705.76x = 122,414.06 × 56,874.66
  4. Step 4: Simplify right side
    88,705.76x = 6,962,257,564.89
  5. Step 5: Solve for x
    x = 6,962,257,564.89/88,705.76
  6. Step 6: Final answer
    x = 78,487.10

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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.