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Finding the Fourth Proportional to 70,840.89, 106,249.80 and 28,719.27

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Solution

The fourth proportional to 70,840.89, 106,249.80 and 28,719.27 is: 43,074.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,840.89 : 106,249.80 = 28,719.27 : x
  2. Step 2: Convert to fraction form
    70,840.89/106,249.80 = 28,719.27/x
  3. Step 3: Cross multiply
    70,840.89x = 106,249.80 × 28,719.27
  4. Step 4: Simplify right side
    70,840.89x = 3,051,416,693.65
  5. Step 5: Solve for x
    x = 3,051,416,693.65/70,840.89
  6. Step 6: Final answer
    x = 43,074.23

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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.