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Finding the Fourth Proportional to 268,859.16, 403,348.74 and 81,885.08

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Solution

The fourth proportional to 268,859.16, 403,348.74 and 81,885.08 is: 122,845.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,859.16 : 403,348.74 = 81,885.08 : x
  2. Step 2: Convert to fraction form
    268,859.16/403,348.74 = 81,885.08/x
  3. Step 3: Cross multiply
    268,859.16x = 403,348.74 × 81,885.08
  4. Step 4: Simplify right side
    268,859.16x = 33,028,243,842.80
  5. Step 5: Solve for x
    x = 33,028,243,842.80/268,859.16
  6. Step 6: Final answer
    x = 122,845.89

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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.