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Finding the Fourth Proportional to 208,291.80, 312,534.90 and 108,564.60

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Solution

The fourth proportional to 208,291.80, 312,534.90 and 108,564.60 is: 162,897.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,291.80 : 312,534.90 = 108,564.60 : x
  2. Step 2: Convert to fraction form
    208,291.80/312,534.90 = 108,564.60/x
  3. Step 3: Cross multiply
    208,291.80x = 312,534.90 × 108,564.60
  4. Step 4: Simplify right side
    208,291.80x = 33,930,226,404.54
  5. Step 5: Solve for x
    x = 33,930,226,404.54/208,291.80
  6. Step 6: Final answer
    x = 162,897.56

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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.