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Finding the Fourth Proportional to 145,847.20, 218,770.80 and 136,989.85

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Solution

The fourth proportional to 145,847.20, 218,770.80 and 136,989.85 is: 205,484.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,847.20 : 218,770.80 = 136,989.85 : x
  2. Step 2: Convert to fraction form
    145,847.20/218,770.80 = 136,989.85/x
  3. Step 3: Cross multiply
    145,847.20x = 218,770.80 × 136,989.85
  4. Step 4: Simplify right side
    145,847.20x = 29,969,379,076.38
  5. Step 5: Solve for x
    x = 29,969,379,076.38/145,847.20
  6. Step 6: Final answer
    x = 205,484.78

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1.5x scale

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.