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Finding the Fourth Proportional to 70,844.76, 106,272.54 and 28,704.78

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Solution

The fourth proportional to 70,844.76, 106,272.54 and 28,704.78 is: 43,059.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,844.76 : 106,272.54 = 28,704.78 : x
  2. Step 2: Convert to fraction form
    70,844.76/106,272.54 = 28,704.78/x
  3. Step 3: Cross multiply
    70,844.76x = 106,272.54 × 28,704.78
  4. Step 4: Simplify right side
    70,844.76x = 3,050,529,880.74
  5. Step 5: Solve for x
    x = 3,050,529,880.74/70,844.76
  6. Step 6: Final answer
    x = 43,059.36

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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.