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Finding the Fourth Proportional to 85,243.35, 127,901.90 and 45,754.34

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Solution

The fourth proportional to 85,243.35, 127,901.90 and 45,754.34 is: 68,651.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,243.35 : 127,901.90 = 45,754.34 : x
  2. Step 2: Convert to fraction form
    85,243.35/127,901.90 = 45,754.34/x
  3. Step 3: Cross multiply
    85,243.35x = 127,901.90 × 45,754.34
  4. Step 4: Simplify right side
    85,243.35x = 5,852,066,494.12
  5. Step 5: Solve for x
    x = 5,852,066,494.12/85,243.35
  6. Step 6: Final answer
    x = 68,651.29

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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.