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Finding the Fourth Proportional to 81,368.70, 122,006.27 and 43,371.16

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Solution

The fourth proportional to 81,368.70, 122,006.27 and 43,371.16 is: 65,031.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,368.70 : 122,006.27 = 43,371.16 : x
  2. Step 2: Convert to fraction form
    81,368.70/122,006.27 = 43,371.16/x
  3. Step 3: Cross multiply
    81,368.70x = 122,006.27 × 43,371.16
  4. Step 4: Simplify right side
    81,368.70x = 5,291,553,240.32
  5. Step 5: Solve for x
    x = 5,291,553,240.32/81,368.70
  6. Step 6: Final answer
    x = 65,031.81

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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.