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Finding the Fourth Proportional to 281,064.30, 421,450.65 and 103,479.90

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Solution

The fourth proportional to 281,064.30, 421,450.65 and 103,479.90 is: 155,166.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,064.30 : 421,450.65 = 103,479.90 : x
  2. Step 2: Convert to fraction form
    281,064.30/421,450.65 = 103,479.90/x
  3. Step 3: Cross multiply
    281,064.30x = 421,450.65 × 103,479.90
  4. Step 4: Simplify right side
    281,064.30x = 43,611,671,116.94
  5. Step 5: Solve for x
    x = 43,611,671,116.94/281,064.30
  6. Step 6: Final answer
    x = 155,166.17

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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.