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Finding the Fourth Proportional to 208,288.80, 312,530.40 and 108,561.60

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Solution

The fourth proportional to 208,288.80, 312,530.40 and 108,561.60 is: 162,893.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,288.80 : 312,530.40 = 108,561.60 : x
  2. Step 2: Convert to fraction form
    208,288.80/312,530.40 = 108,561.60/x
  3. Step 3: Cross multiply
    208,288.80x = 312,530.40 × 108,561.60
  4. Step 4: Simplify right side
    208,288.80x = 33,928,800,272.64
  5. Step 5: Solve for x
    x = 33,928,800,272.64/208,288.80
  6. Step 6: Final answer
    x = 162,893.06

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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.