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Finding the Fourth Proportional to 210,115.30, 315,175.56 and 69,873.88

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Solution

The fourth proportional to 210,115.30, 315,175.56 and 69,873.88 is: 104,811.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,115.30 : 315,175.56 = 69,873.88 : x
  2. Step 2: Convert to fraction form
    210,115.30/315,175.56 = 69,873.88/x
  3. Step 3: Cross multiply
    210,115.30x = 315,175.56 × 69,873.88
  4. Step 4: Simplify right side
    210,115.30x = 22,022,539,258.37
  5. Step 5: Solve for x
    x = 22,022,539,258.37/210,115.30
  6. Step 6: Final answer
    x = 104,811.69

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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.