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Finding the Fourth Proportional to 425,841.41, 638,576.67 and 122,168.57

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Solution

The fourth proportional to 425,841.41, 638,576.67 and 122,168.57 is: 183,199.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,841.41 : 638,576.67 = 122,168.57 : x
  2. Step 2: Convert to fraction form
    425,841.41/638,576.67 = 122,168.57/x
  3. Step 3: Cross multiply
    425,841.41x = 638,576.67 × 122,168.57
  4. Step 4: Simplify right side
    425,841.41x = 78,013,995,416.38
  5. Step 5: Solve for x
    x = 78,013,995,416.38/425,841.41
  6. Step 6: Final answer
    x = 183,199.65

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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.