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Finding the Fourth Proportional to 65,790, 98,685.84 and 19,042.92

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Solution

The fourth proportional to 65,790, 98,685.84 and 19,042.92 is: 28,564.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,790 : 98,685.84 = 19,042.92 : x
  2. Step 2: Convert to fraction form
    65,790/98,685.84 = 19,042.92/x
  3. Step 3: Cross multiply
    65,790x = 98,685.84 × 19,042.92
  4. Step 4: Simplify right side
    65,790x = 1,879,266,556.25
  5. Step 5: Solve for x
    x = 1,879,266,556.25/65,790
  6. Step 6: Final answer
    x = 28,564.62

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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.