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Finding the Fourth Proportional to 91,704.28, 137,603.80 and 39,099.64

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Solution

The fourth proportional to 91,704.28, 137,603.80 and 39,099.64 is: 58,669.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,704.28 : 137,603.80 = 39,099.64 : x
  2. Step 2: Convert to fraction form
    91,704.28/137,603.80 = 39,099.64/x
  3. Step 3: Cross multiply
    91,704.28x = 137,603.80 × 39,099.64
  4. Step 4: Simplify right side
    91,704.28x = 5,380,259,042.63
  5. Step 5: Solve for x
    x = 5,380,259,042.63/91,704.28
  6. Step 6: Final answer
    x = 58,669.66

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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.