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Finding the Fourth Proportional to 129,395.93, 178,525.17 and 72,796.37

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Solution

The fourth proportional to 129,395.93, 178,525.17 and 72,796.37 is: 100,435.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,395.93 : 178,525.17 = 72,796.37 : x
  2. Step 2: Convert to fraction form
    129,395.93/178,525.17 = 72,796.37/x
  3. Step 3: Cross multiply
    129,395.93x = 178,525.17 × 72,796.37
  4. Step 4: Simplify right side
    129,395.93x = 12,995,984,775.95
  5. Step 5: Solve for x
    x = 12,995,984,775.95/129,395.93
  6. Step 6: Final answer
    x = 100,435.81

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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.