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Finding the Fourth Proportional to 45,409.74, 68,045.76 and 19,107.42

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Solution

The fourth proportional to 45,409.74, 68,045.76 and 19,107.42 is: 28,632.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,409.74 : 68,045.76 = 19,107.42 : x
  2. Step 2: Convert to fraction form
    45,409.74/68,045.76 = 19,107.42/x
  3. Step 3: Cross multiply
    45,409.74x = 68,045.76 × 19,107.42
  4. Step 4: Simplify right side
    45,409.74x = 1,300,178,915.54
  5. Step 5: Solve for x
    x = 1,300,178,915.54/45,409.74
  6. Step 6: Final answer
    x = 28,632.16

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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.