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Finding the Fourth Proportional to 261,503.97, 392,466.15 and 135,181.38

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Solution

The fourth proportional to 261,503.97, 392,466.15 and 135,181.38 is: 202,880.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,503.97 : 392,466.15 = 135,181.38 : x
  2. Step 2: Convert to fraction form
    261,503.97/392,466.15 = 135,181.38/x
  3. Step 3: Cross multiply
    261,503.97x = 392,466.15 × 135,181.38
  4. Step 4: Simplify right side
    261,503.97x = 53,054,115,760.29
  5. Step 5: Solve for x
    x = 53,054,115,760.29/261,503.97
  6. Step 6: Final answer
    x = 202,880.73

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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.