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Finding the Fourth Proportional to 255,915.92, 353,164.46 and 142,745.96

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Solution

The fourth proportional to 255,915.92, 353,164.46 and 142,745.96 is: 196,989.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,915.92 : 353,164.46 = 142,745.96 : x
  2. Step 2: Convert to fraction form
    255,915.92/353,164.46 = 142,745.96/x
  3. Step 3: Cross multiply
    255,915.92x = 353,164.46 × 142,745.96
  4. Step 4: Simplify right side
    255,915.92x = 50,412,799,880.58
  5. Step 5: Solve for x
    x = 50,412,799,880.58/255,915.92
  6. Step 6: Final answer
    x = 196,989.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.