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Finding the Fourth Proportional to 268,879.68, 403,378.08 and 81,886.32

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Solution

The fourth proportional to 268,879.68, 403,378.08 and 81,886.32 is: 122,847.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,879.68 : 403,378.08 = 81,886.32 : x
  2. Step 2: Convert to fraction form
    268,879.68/403,378.08 = 81,886.32/x
  3. Step 3: Cross multiply
    268,879.68x = 403,378.08 × 81,886.32
  4. Step 4: Simplify right side
    268,879.68x = 33,031,146,539.87
  5. Step 5: Solve for x
    x = 33,031,146,539.87/268,879.68
  6. Step 6: Final answer
    x = 122,847.31

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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.