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Finding the Fourth Proportional to 91,200.90, 136,582.65 and 73,704.90

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Solution

The fourth proportional to 91,200.90, 136,582.65 and 73,704.90 is: 110,380.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,200.90 : 136,582.65 = 73,704.90 : x
  2. Step 2: Convert to fraction form
    91,200.90/136,582.65 = 73,704.90/x
  3. Step 3: Cross multiply
    91,200.90x = 136,582.65 × 73,704.90
  4. Step 4: Simplify right side
    91,200.90x = 10,066,810,559.99
  5. Step 5: Solve for x
    x = 10,066,810,559.99/91,200.90
  6. Step 6: Final answer
    x = 110,380.61

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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.