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Finding the Fourth Proportional to 281,278.59, 421,852.25 and 81,545.37

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Solution

The fourth proportional to 281,278.59, 421,852.25 and 81,545.37 is: 122,299.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,278.59 : 421,852.25 = 81,545.37 : x
  2. Step 2: Convert to fraction form
    281,278.59/421,852.25 = 81,545.37/x
  3. Step 3: Cross multiply
    281,278.59x = 421,852.25 × 81,545.37
  4. Step 4: Simplify right side
    281,278.59x = 34,400,098,015.45
  5. Step 5: Solve for x
    x = 34,400,098,015.45/281,278.59
  6. Step 6: Final answer
    x = 122,299.03

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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.