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Finding the Fourth Proportional to 351,382.33, 527,071.74 and 85,142.89

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Solution

The fourth proportional to 351,382.33, 527,071.74 and 85,142.89 is: 127,713.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,382.33 : 527,071.74 = 85,142.89 : x
  2. Step 2: Convert to fraction form
    351,382.33/527,071.74 = 85,142.89/x
  3. Step 3: Cross multiply
    351,382.33x = 527,071.74 × 85,142.89
  4. Step 4: Simplify right side
    351,382.33x = 44,876,411,180.93
  5. Step 5: Solve for x
    x = 44,876,411,180.93/351,382.33
  6. Step 6: Final answer
    x = 127,713.91

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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.