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Finding the Fourth Proportional to 104,743.70, 157,115.55 and 81,386.90

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Solution

The fourth proportional to 104,743.70, 157,115.55 and 81,386.90 is: 122,080.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,743.70 : 157,115.55 = 81,386.90 : x
  2. Step 2: Convert to fraction form
    104,743.70/157,115.55 = 81,386.90/x
  3. Step 3: Cross multiply
    104,743.70x = 157,115.55 × 81,386.90
  4. Step 4: Simplify right side
    104,743.70x = 12,787,147,556.30
  5. Step 5: Solve for x
    x = 12,787,147,556.30/104,743.70
  6. Step 6: Final answer
    x = 122,080.35

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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.