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Finding the Fourth Proportional to 91,749.60, 137,494.80 and 64,015.20

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Solution

The fourth proportional to 91,749.60, 137,494.80 and 64,015.20 is: 95,932.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,749.60 : 137,494.80 = 64,015.20 : x
  2. Step 2: Convert to fraction form
    91,749.60/137,494.80 = 64,015.20/x
  3. Step 3: Cross multiply
    91,749.60x = 137,494.80 × 64,015.20
  4. Step 4: Simplify right side
    91,749.60x = 8,801,757,120.96
  5. Step 5: Solve for x
    x = 8,801,757,120.96/91,749.60
  6. Step 6: Final answer
    x = 95,932.38

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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.