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Finding the Fourth Proportional to 281,201.70, 421,802.55 and 81,528.60

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Solution

The fourth proportional to 281,201.70, 421,802.55 and 81,528.60 is: 122,292.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,201.70 : 421,802.55 = 81,528.60 : x
  2. Step 2: Convert to fraction form
    281,201.70/421,802.55 = 81,528.60/x
  3. Step 3: Cross multiply
    281,201.70x = 421,802.55 × 81,528.60
  4. Step 4: Simplify right side
    281,201.70x = 34,388,971,377.93
  5. Step 5: Solve for x
    x = 34,388,971,377.93/281,201.70
  6. Step 6: Final answer
    x = 122,292.90

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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.