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Finding the Fourth Proportional to 231,812.80, 347,632.80 and 91,542.40

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Solution

The fourth proportional to 231,812.80, 347,632.80 and 91,542.40 is: 137,279.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,812.80 : 347,632.80 = 91,542.40 : x
  2. Step 2: Convert to fraction form
    231,812.80/347,632.80 = 91,542.40/x
  3. Step 3: Cross multiply
    231,812.80x = 347,632.80 × 91,542.40
  4. Step 4: Simplify right side
    231,812.80x = 31,823,140,830.72
  5. Step 5: Solve for x
    x = 31,823,140,830.72/231,812.80
  6. Step 6: Final answer
    x = 137,279.48

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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.