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Finding the Fourth Proportional to 255,915.78, 383,709.24 and 106,259.40

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Solution

The fourth proportional to 255,915.78, 383,709.24 and 106,259.40 is: 159,320.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,915.78 : 383,709.24 = 106,259.40 : x
  2. Step 2: Convert to fraction form
    255,915.78/383,709.24 = 106,259.40/x
  3. Step 3: Cross multiply
    255,915.78x = 383,709.24 × 106,259.40
  4. Step 4: Simplify right side
    255,915.78x = 40,772,713,616.86
  5. Step 5: Solve for x
    x = 40,772,713,616.86/255,915.78
  6. Step 6: Final answer
    x = 159,320.83

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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.