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Finding the Fourth Proportional to 268,459.08, 402,679.30 and 68,781.12

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Solution

The fourth proportional to 268,459.08, 402,679.30 and 68,781.12 is: 103,169.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,459.08 : 402,679.30 = 68,781.12 : x
  2. Step 2: Convert to fraction form
    268,459.08/402,679.30 = 68,781.12/x
  3. Step 3: Cross multiply
    268,459.08x = 402,679.30 × 68,781.12
  4. Step 4: Simplify right side
    268,459.08x = 27,696,733,254.82
  5. Step 5: Solve for x
    x = 27,696,733,254.82/268,459.08
  6. Step 6: Final answer
    x = 103,169.29

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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.