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Finding the Fourth Proportional to 281,172.34, 421,763.37 and 103,587.94

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Solution

The fourth proportional to 281,172.34, 421,763.37 and 103,587.94 is: 155,383.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,172.34 : 421,763.37 = 103,587.94 : x
  2. Step 2: Convert to fraction form
    281,172.34/421,763.37 = 103,587.94/x
  3. Step 3: Cross multiply
    281,172.34x = 421,763.37 × 103,587.94
  4. Step 4: Simplify right side
    281,172.34x = 43,689,598,665.76
  5. Step 5: Solve for x
    x = 43,689,598,665.76/281,172.34
  6. Step 6: Final answer
    x = 155,383.70

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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.