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Finding the Fourth Proportional to 255,432.33, 383,144.31 and 87,069.87

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Solution

The fourth proportional to 255,432.33, 383,144.31 and 87,069.87 is: 130,603.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,432.33 : 383,144.31 = 87,069.87 : x
  2. Step 2: Convert to fraction form
    255,432.33/383,144.31 = 87,069.87/x
  3. Step 3: Cross multiply
    255,432.33x = 383,144.31 × 87,069.87
  4. Step 4: Simplify right side
    255,432.33x = 33,360,325,262.94
  5. Step 5: Solve for x
    x = 33,360,325,262.94/255,432.33
  6. Step 6: Final answer
    x = 130,603.38

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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.