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Finding the Fourth Proportional to 128,729.69, 193,047.13 and 44,468.22

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Solution

The fourth proportional to 128,729.69, 193,047.13 and 44,468.22 is: 66,685.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,729.69 : 193,047.13 = 44,468.22 : x
  2. Step 2: Convert to fraction form
    128,729.69/193,047.13 = 44,468.22/x
  3. Step 3: Cross multiply
    128,729.69x = 193,047.13 × 44,468.22
  4. Step 4: Simplify right side
    128,729.69x = 8,584,463,026.72
  5. Step 5: Solve for x
    x = 8,584,463,026.72/128,729.69
  6. Step 6: Final answer
    x = 66,685.96

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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.