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Finding the Fourth Proportional to 129,791.42, 179,109.69 and 73,202.78

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Solution

The fourth proportional to 129,791.42, 179,109.69 and 73,202.78 is: 101,018.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,791.42 : 179,109.69 = 73,202.78 : x
  2. Step 2: Convert to fraction form
    129,791.42/179,109.69 = 73,202.78/x
  3. Step 3: Cross multiply
    129,791.42x = 179,109.69 × 73,202.78
  4. Step 4: Simplify right side
    129,791.42x = 13,111,327,232.94
  5. Step 5: Solve for x
    x = 13,111,327,232.94/129,791.42
  6. Step 6: Final answer
    x = 101,018.44

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1.5x scale

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.