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Finding the Fourth Proportional to 261,394.31, 392,096.34 and 74,410.67

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Solution

The fourth proportional to 261,394.31, 392,096.34 and 74,410.67 is: 111,617.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,394.31 : 392,096.34 = 74,410.67 : x
  2. Step 2: Convert to fraction form
    261,394.31/392,096.34 = 74,410.67/x
  3. Step 3: Cross multiply
    261,394.31x = 392,096.34 × 74,410.67
  4. Step 4: Simplify right side
    261,394.31x = 29,176,152,344.19
  5. Step 5: Solve for x
    x = 29,176,152,344.19/261,394.31
  6. Step 6: Final answer
    x = 111,617.40

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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.