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Finding the Fourth Proportional to 91,397.80, 136,902.30 and 75,845.80

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Solution

The fourth proportional to 91,397.80, 136,902.30 and 75,845.80 is: 113,607.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,397.80 : 136,902.30 = 75,845.80 : x
  2. Step 2: Convert to fraction form
    91,397.80/136,902.30 = 75,845.80/x
  3. Step 3: Cross multiply
    91,397.80x = 136,902.30 × 75,845.80
  4. Step 4: Simplify right side
    91,397.80x = 10,383,464,465.34
  5. Step 5: Solve for x
    x = 10,383,464,465.34/91,397.80
  6. Step 6: Final answer
    x = 113,607.38

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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.