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Finding the Fourth Proportional to 104,256.82, 143,889.79 and 66,019.86

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Solution

The fourth proportional to 104,256.82, 143,889.79 and 66,019.86 is: 91,117.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,256.82 : 143,889.79 = 66,019.86 : x
  2. Step 2: Convert to fraction form
    104,256.82/143,889.79 = 66,019.86/x
  3. Step 3: Cross multiply
    104,256.82x = 143,889.79 × 66,019.86
  4. Step 4: Simplify right side
    104,256.82x = 9,499,583,791.23
  5. Step 5: Solve for x
    x = 9,499,583,791.23/104,256.82
  6. Step 6: Final answer
    x = 91,117.15

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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.