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Finding the Fourth Proportional to 231,605.80, 347,322.30 and 91,335.40

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Solution

The fourth proportional to 231,605.80, 347,322.30 and 91,335.40 is: 136,969.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,605.80 : 347,322.30 = 91,335.40 : x
  2. Step 2: Convert to fraction form
    231,605.80/347,322.30 = 91,335.40/x
  3. Step 3: Cross multiply
    231,605.80x = 347,322.30 × 91,335.40
  4. Step 4: Simplify right side
    231,605.80x = 31,722,821,199.42
  5. Step 5: Solve for x
    x = 31,722,821,199.42/231,605.80
  6. Step 6: Final answer
    x = 136,969.03

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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.