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Finding the Fourth Proportional to 91,311.80, 136,965.26 and 41,355.86

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Solution

The fourth proportional to 91,311.80, 136,965.26 and 41,355.86 is: 62,032.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,311.80 : 136,965.26 = 41,355.86 : x
  2. Step 2: Convert to fraction form
    91,311.80/136,965.26 = 41,355.86/x
  3. Step 3: Cross multiply
    91,311.80x = 136,965.26 × 41,355.86
  4. Step 4: Simplify right side
    91,311.80x = 5,664,315,225.82
  5. Step 5: Solve for x
    x = 5,664,315,225.82/91,311.80
  6. Step 6: Final answer
    x = 62,032.68

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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.