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Finding the Fourth Proportional to 261,785.12, 392,677.62 and 74,796.62

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Solution

The fourth proportional to 261,785.12, 392,677.62 and 74,796.62 is: 112,194.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,785.12 : 392,677.62 = 74,796.62 : x
  2. Step 2: Convert to fraction form
    261,785.12/392,677.62 = 74,796.62/x
  3. Step 3: Cross multiply
    261,785.12x = 392,677.62 × 74,796.62
  4. Step 4: Simplify right side
    261,785.12x = 29,370,958,725.64
  5. Step 5: Solve for x
    x = 29,370,958,725.64/261,785.12
  6. Step 6: Final answer
    x = 112,194.91

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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.