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Finding the Fourth Proportional to 425,841.16, 638,576.30 and 122,168.31

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Solution

The fourth proportional to 425,841.16, 638,576.30 and 122,168.31 is: 183,199.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,841.16 : 638,576.30 = 122,168.31 : x
  2. Step 2: Convert to fraction form
    425,841.16/638,576.30 = 122,168.31/x
  3. Step 3: Cross multiply
    425,841.16x = 638,576.30 × 122,168.31
  4. Step 4: Simplify right side
    425,841.16x = 78,013,787,377.05
  5. Step 5: Solve for x
    x = 78,013,787,377.05/425,841.16
  6. Step 6: Final answer
    x = 183,199.26

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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.