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Finding the Fourth Proportional to 255,781.97, 383,567.39 and 87,315.88

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Solution

The fourth proportional to 255,781.97, 383,567.39 and 87,315.88 is: 130,937.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,781.97 : 383,567.39 = 87,315.88 : x
  2. Step 2: Convert to fraction form
    255,781.97/383,567.39 = 87,315.88/x
  3. Step 3: Cross multiply
    255,781.97x = 383,567.39 × 87,315.88
  4. Step 4: Simplify right side
    255,781.97x = 33,491,521,842.74
  5. Step 5: Solve for x
    x = 33,491,521,842.74/255,781.97
  6. Step 6: Final answer
    x = 130,937.77

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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.