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Finding the Fourth Proportional to 427,556.88, 641,316.92 and 112,006.80

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Solution

The fourth proportional to 427,556.88, 641,316.92 and 112,006.80 is: 168,005.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,556.88 : 641,316.92 = 112,006.80 : x
  2. Step 2: Convert to fraction form
    427,556.88/641,316.92 = 112,006.80/x
  3. Step 3: Cross multiply
    427,556.88x = 641,316.92 × 112,006.80
  4. Step 4: Simplify right side
    427,556.88x = 71,831,855,995.06
  5. Step 5: Solve for x
    x = 71,831,855,995.06/427,556.88
  6. Step 6: Final answer
    x = 168,005.38

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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.