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Finding the Fourth Proportional to 261,336.92, 392,005.44 and 74,348.42

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Solution

The fourth proportional to 261,336.92, 392,005.44 and 74,348.42 is: 111,522.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,336.92 : 392,005.44 = 74,348.42 : x
  2. Step 2: Convert to fraction form
    261,336.92/392,005.44 = 74,348.42/x
  3. Step 3: Cross multiply
    261,336.92x = 392,005.44 × 74,348.42
  4. Step 4: Simplify right side
    261,336.92x = 29,144,983,135.38
  5. Step 5: Solve for x
    x = 29,144,983,135.38/261,336.92
  6. Step 6: Final answer
    x = 111,522.64

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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.