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Finding the Fourth Proportional to 265,971.72, 398,612.88 and 108,016.68

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Solution

The fourth proportional to 265,971.72, 398,612.88 and 108,016.68 is: 161,885.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,971.72 : 398,612.88 = 108,016.68 : x
  2. Step 2: Convert to fraction form
    265,971.72/398,612.88 = 108,016.68/x
  3. Step 3: Cross multiply
    265,971.72x = 398,612.88 × 108,016.68
  4. Step 4: Simplify right side
    265,971.72x = 43,056,839,902.84
  5. Step 5: Solve for x
    x = 43,056,839,902.84/265,971.72
  6. Step 6: Final answer
    x = 161,885.03

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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.