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Finding the Fourth Proportional to 68,469.60, 102,704.40 and 42,088.80

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Solution

The fourth proportional to 68,469.60, 102,704.40 and 42,088.80 is: 63,133.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,469.60 : 102,704.40 = 42,088.80 : x
  2. Step 2: Convert to fraction form
    68,469.60/102,704.40 = 42,088.80/x
  3. Step 3: Cross multiply
    68,469.60x = 102,704.40 × 42,088.80
  4. Step 4: Simplify right side
    68,469.60x = 4,322,704,950.72
  5. Step 5: Solve for x
    x = 4,322,704,950.72/68,469.60
  6. Step 6: Final answer
    x = 63,133.20

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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.