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Finding the Fourth Proportional to 347,527.20, 521,161.20 and 137,121.60

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Solution

The fourth proportional to 347,527.20, 521,161.20 and 137,121.60 is: 205,631.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,527.20 : 521,161.20 = 137,121.60 : x
  2. Step 2: Convert to fraction form
    347,527.20/521,161.20 = 137,121.60/x
  3. Step 3: Cross multiply
    347,527.20x = 521,161.20 × 137,121.60
  4. Step 4: Simplify right side
    347,527.20x = 71,462,457,601.92
  5. Step 5: Solve for x
    x = 71,462,457,601.92/347,527.20
  6. Step 6: Final answer
    x = 205,631.26

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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.