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Finding the Fourth Proportional to 255,754.28, 383,363.88 and 87,215.60

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Solution

The fourth proportional to 255,754.28, 383,363.88 and 87,215.60 is: 130,732.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,754.28 : 383,363.88 = 87,215.60 : x
  2. Step 2: Convert to fraction form
    255,754.28/383,363.88 = 87,215.60/x
  3. Step 3: Cross multiply
    255,754.28x = 383,363.88 × 87,215.60
  4. Step 4: Simplify right side
    255,754.28x = 33,435,310,812.53
  5. Step 5: Solve for x
    x = 33,435,310,812.53/255,754.28
  6. Step 6: Final answer
    x = 130,732.17

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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.