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Finding the Fourth Proportional to 231,887.80, 347,847.90 and 91,628.20

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Solution

The fourth proportional to 231,887.80, 347,847.90 and 91,628.20 is: 137,448.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,887.80 : 347,847.90 = 91,628.20 : x
  2. Step 2: Convert to fraction form
    231,887.80/347,847.90 = 91,628.20/x
  3. Step 3: Cross multiply
    231,887.80x = 347,847.90 × 91,628.20
  4. Step 4: Simplify right side
    231,887.80x = 31,872,676,950.78
  5. Step 5: Solve for x
    x = 31,872,676,950.78/231,887.80
  6. Step 6: Final answer
    x = 137,448.70

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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.