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Finding the Fourth Proportional to 281,162.89, 421,701.03 and 91,622.79

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Solution

The fourth proportional to 281,162.89, 421,701.03 and 91,622.79 is: 137,420.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,162.89 : 421,701.03 = 91,622.79 : x
  2. Step 2: Convert to fraction form
    281,162.89/421,701.03 = 91,622.79/x
  3. Step 3: Cross multiply
    281,162.89x = 421,701.03 × 91,622.79
  4. Step 4: Simplify right side
    281,162.89x = 38,637,424,456.36
  5. Step 5: Solve for x
    x = 38,637,424,456.36/281,162.89
  6. Step 6: Final answer
    x = 137,420.07

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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.