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Finding the Fourth Proportional to 51,261.60, 76,827.60 and 45,688.80

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Solution

The fourth proportional to 51,261.60, 76,827.60 and 45,688.80 is: 68,475.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,261.60 : 76,827.60 = 45,688.80 : x
  2. Step 2: Convert to fraction form
    51,261.60/76,827.60 = 45,688.80/x
  3. Step 3: Cross multiply
    51,261.60x = 76,827.60 × 45,688.80
  4. Step 4: Simplify right side
    51,261.60x = 3,510,160,850.88
  5. Step 5: Solve for x
    x = 3,510,160,850.88/51,261.60
  6. Step 6: Final answer
    x = 68,475.44

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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.