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Finding the Fourth Proportional to 100,369.63, 138,497.24 and 57,351.85

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Solution

The fourth proportional to 100,369.63, 138,497.24 and 57,351.85 is: 79,138.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,369.63 : 138,497.24 = 57,351.85 : x
  2. Step 2: Convert to fraction form
    100,369.63/138,497.24 = 57,351.85/x
  3. Step 3: Cross multiply
    100,369.63x = 138,497.24 × 57,351.85
  4. Step 4: Simplify right side
    100,369.63x = 7,943,073,607.46
  5. Step 5: Solve for x
    x = 7,943,073,607.46/100,369.63
  6. Step 6: Final answer
    x = 79,138.22

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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.