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Finding the Fourth Proportional to 68,785.45, 103,152.03 and 28,807.09

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Solution

The fourth proportional to 68,785.45, 103,152.03 and 28,807.09 is: 43,199.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,785.45 : 103,152.03 = 28,807.09 : x
  2. Step 2: Convert to fraction form
    68,785.45/103,152.03 = 28,807.09/x
  3. Step 3: Cross multiply
    68,785.45x = 103,152.03 × 28,807.09
  4. Step 4: Simplify right side
    68,785.45x = 2,971,510,188.26
  5. Step 5: Solve for x
    x = 2,971,510,188.26/68,785.45
  6. Step 6: Final answer
    x = 43,199.69

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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.