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Finding the Fourth Proportional to 281,122.20, 421,683.30 and 186,643.80

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Solution

The fourth proportional to 281,122.20, 421,683.30 and 186,643.80 is: 279,965.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,122.20 : 421,683.30 = 186,643.80 : x
  2. Step 2: Convert to fraction form
    281,122.20/421,683.30 = 186,643.80/x
  3. Step 3: Cross multiply
    281,122.20x = 421,683.30 × 186,643.80
  4. Step 4: Simplify right side
    281,122.20x = 78,704,573,508.54
  5. Step 5: Solve for x
    x = 78,704,573,508.54/281,122.20
  6. Step 6: Final answer
    x = 279,965.70

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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.