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Finding the Fourth Proportional to 78,908.43, 118,362.96 and 19,743.93

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Solution

The fourth proportional to 78,908.43, 118,362.96 and 19,743.93 is: 29,615.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,908.43 : 118,362.96 = 19,743.93 : x
  2. Step 2: Convert to fraction form
    78,908.43/118,362.96 = 19,743.93/x
  3. Step 3: Cross multiply
    78,908.43x = 118,362.96 × 19,743.93
  4. Step 4: Simplify right side
    78,908.43x = 2,336,949,996.83
  5. Step 5: Solve for x
    x = 2,336,949,996.83/78,908.43
  6. Step 6: Final answer
    x = 29,615.97

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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.