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Finding the Fourth Proportional to 85,310.66, 127,845.70 and 40,283.98

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Solution

The fourth proportional to 85,310.66, 127,845.70 and 40,283.98 is: 60,369.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,310.66 : 127,845.70 = 40,283.98 : x
  2. Step 2: Convert to fraction form
    85,310.66/127,845.70 = 40,283.98/x
  3. Step 3: Cross multiply
    85,310.66x = 127,845.70 × 40,283.98
  4. Step 4: Simplify right side
    85,310.66x = 5,150,133,621.89
  5. Step 5: Solve for x
    x = 5,150,133,621.89/85,310.66
  6. Step 6: Final answer
    x = 60,369.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.