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Finding the Fourth Proportional to 86,142.90, 129,161.43 and 33,491.01

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Solution

The fourth proportional to 86,142.90, 129,161.43 and 33,491.01 is: 50,215.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,142.90 : 129,161.43 = 33,491.01 : x
  2. Step 2: Convert to fraction form
    86,142.90/129,161.43 = 33,491.01/x
  3. Step 3: Cross multiply
    86,142.90x = 129,161.43 × 33,491.01
  4. Step 4: Simplify right side
    86,142.90x = 4,325,746,743.74
  5. Step 5: Solve for x
    x = 4,325,746,743.74/86,142.90
  6. Step 6: Final answer
    x = 50,215.94

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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.