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Finding the Fourth Proportional to 91,266.60, 136,922.58 and 53,857.56

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Solution

The fourth proportional to 91,266.60, 136,922.58 and 53,857.56 is: 80,799.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,266.60 : 136,922.58 = 53,857.56 : x
  2. Step 2: Convert to fraction form
    91,266.60/136,922.58 = 53,857.56/x
  3. Step 3: Cross multiply
    91,266.60x = 136,922.58 × 53,857.56
  4. Step 4: Simplify right side
    91,266.60x = 7,374,316,067.70
  5. Step 5: Solve for x
    x = 7,374,316,067.70/91,266.60
  6. Step 6: Final answer
    x = 80,799.72

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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.