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Finding the Fourth Proportional to 261,717.40, 392,576.10 and 74,704.60

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Solution

The fourth proportional to 261,717.40, 392,576.10 and 74,704.60 is: 112,056.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,717.40 : 392,576.10 = 74,704.60 : x
  2. Step 2: Convert to fraction form
    261,717.40/392,576.10 = 74,704.60/x
  3. Step 3: Cross multiply
    261,717.40x = 392,576.10 × 74,704.60
  4. Step 4: Simplify right side
    261,717.40x = 29,327,240,520.06
  5. Step 5: Solve for x
    x = 29,327,240,520.06/261,717.40
  6. Step 6: Final answer
    x = 112,056.90

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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.