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Finding the Fourth Proportional to 281,247.93, 421,860.96 and 103,678.11

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Solution

The fourth proportional to 281,247.93, 421,860.96 and 103,678.11 is: 155,513.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,247.93 : 421,860.96 = 103,678.11 : x
  2. Step 2: Convert to fraction form
    281,247.93/421,860.96 = 103,678.11/x
  3. Step 3: Cross multiply
    281,247.93x = 421,860.96 × 103,678.11
  4. Step 4: Simplify right side
    281,247.93x = 43,737,747,015.59
  5. Step 5: Solve for x
    x = 43,737,747,015.59/281,247.93
  6. Step 6: Final answer
    x = 155,513.13

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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.