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Finding the Fourth Proportional to 255,778.73, 383,562.53 and 87,312.64

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Solution

The fourth proportional to 255,778.73, 383,562.53 and 87,312.64 is: 130,932.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,778.73 : 383,562.53 = 87,312.64 : x
  2. Step 2: Convert to fraction form
    255,778.73/383,562.53 = 87,312.64/x
  3. Step 3: Cross multiply
    255,778.73x = 383,562.53 × 87,312.64
  4. Step 4: Simplify right side
    255,778.73x = 33,489,855,671.74
  5. Step 5: Solve for x
    x = 33,489,855,671.74/255,778.73
  6. Step 6: Final answer
    x = 130,932.92

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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.