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Finding the Fourth Proportional to 70,651.56, 105,976.08 and 28,530.60

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Solution

The fourth proportional to 70,651.56, 105,976.08 and 28,530.60 is: 42,795.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,651.56 : 105,976.08 = 28,530.60 : x
  2. Step 2: Convert to fraction form
    70,651.56/105,976.08 = 28,530.60/x
  3. Step 3: Cross multiply
    70,651.56x = 105,976.08 × 28,530.60
  4. Step 4: Simplify right side
    70,651.56x = 3,023,561,148.05
  5. Step 5: Solve for x
    x = 3,023,561,148.05/70,651.56
  6. Step 6: Final answer
    x = 42,795.39

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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.