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Finding the Fourth Proportional to 231,808.40, 347,712.60 and 74,052.80

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Solution

The fourth proportional to 231,808.40, 347,712.60 and 74,052.80 is: 111,079.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,808.40 : 347,712.60 = 74,052.80 : x
  2. Step 2: Convert to fraction form
    231,808.40/347,712.60 = 74,052.80/x
  3. Step 3: Cross multiply
    231,808.40x = 347,712.60 × 74,052.80
  4. Step 4: Simplify right side
    231,808.40x = 25,749,091,625.28
  5. Step 5: Solve for x
    x = 25,749,091,625.28/231,808.40
  6. Step 6: Final answer
    x = 111,079.20

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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.