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Finding the Fourth Proportional to 231,740.40, 347,610.60 and 91,480.80

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Solution

The fourth proportional to 231,740.40, 347,610.60 and 91,480.80 is: 137,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,740.40 : 347,610.60 = 91,480.80 : x
  2. Step 2: Convert to fraction form
    231,740.40/347,610.60 = 91,480.80/x
  3. Step 3: Cross multiply
    231,740.40x = 347,610.60 × 91,480.80
  4. Step 4: Simplify right side
    231,740.40x = 31,799,695,776.48
  5. Step 5: Solve for x
    x = 31,799,695,776.48/231,740.40
  6. Step 6: Final answer
    x = 137,221.20

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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.