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Finding the Fourth Proportional to 70,891.60, 106,337.40 and 28,771.60

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Solution

The fourth proportional to 70,891.60, 106,337.40 and 28,771.60 is: 43,157.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,891.60 : 106,337.40 = 28,771.60 : x
  2. Step 2: Convert to fraction form
    70,891.60/106,337.40 = 28,771.60/x
  3. Step 3: Cross multiply
    70,891.60x = 106,337.40 × 28,771.60
  4. Step 4: Simplify right side
    70,891.60x = 3,059,497,137.84
  5. Step 5: Solve for x
    x = 3,059,497,137.84/70,891.60
  6. Step 6: Final answer
    x = 43,157.40

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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.