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Finding the Fourth Proportional to 205,520.64, 308,334.72 and 87,196.80

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Solution

The fourth proportional to 205,520.64, 308,334.72 and 87,196.80 is: 130,818.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,520.64 : 308,334.72 = 87,196.80 : x
  2. Step 2: Convert to fraction form
    205,520.64/308,334.72 = 87,196.80/x
  3. Step 3: Cross multiply
    205,520.64x = 308,334.72 × 87,196.80
  4. Step 4: Simplify right side
    205,520.64x = 26,885,800,912.90
  5. Step 5: Solve for x
    x = 26,885,800,912.90/205,520.64
  6. Step 6: Final answer
    x = 130,818.01

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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.