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Finding the Fourth Proportional to 109,662.66, 151,331.90 and 61,914.78

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Solution

The fourth proportional to 109,662.66, 151,331.90 and 61,914.78 is: 85,440.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,662.66 : 151,331.90 = 61,914.78 : x
  2. Step 2: Convert to fraction form
    109,662.66/151,331.90 = 61,914.78/x
  3. Step 3: Cross multiply
    109,662.66x = 151,331.90 × 61,914.78
  4. Step 4: Simplify right side
    109,662.66x = 9,369,680,985.91
  5. Step 5: Solve for x
    x = 9,369,680,985.91/109,662.66
  6. Step 6: Final answer
    x = 85,440.94

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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.