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Finding the Fourth Proportional to 268,877.73, 403,249.64 and 81,886.53

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Solution

The fourth proportional to 268,877.73, 403,249.64 and 81,886.53 is: 122,809.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,877.73 : 403,249.64 = 81,886.53 : x
  2. Step 2: Convert to fraction form
    268,877.73/403,249.64 = 81,886.53/x
  3. Step 3: Cross multiply
    268,877.73x = 403,249.64 × 81,886.53
  4. Step 4: Simplify right side
    268,877.73x = 33,020,713,333.92
  5. Step 5: Solve for x
    x = 33,020,713,333.92/268,877.73
  6. Step 6: Final answer
    x = 122,809.40

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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.