Home / 268,909.50-403,364.28-81,921

Finding the Fourth Proportional to 268,909.50, 403,364.28 and 81,921

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Solution

The fourth proportional to 268,909.50, 403,364.28 and 81,921 is: 122,881.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,909.50 : 403,364.28 = 81,921 : x
  2. Step 2: Convert to fraction form
    268,909.50/403,364.28 = 81,921/x
  3. Step 3: Cross multiply
    268,909.50x = 403,364.28 × 81,921
  4. Step 4: Simplify right side
    268,909.50x = 33,044,005,181.88
  5. Step 5: Solve for x
    x = 33,044,005,181.88/268,909.50
  6. Step 6: Final answer
    x = 122,881.51

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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.