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Finding the Fourth Proportional to 208,818.40, 312,536.40 and 161,816.80

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Solution

The fourth proportional to 208,818.40, 312,536.40 and 161,816.80 is: 242,189.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,818.40 : 312,536.40 = 161,816.80 : x
  2. Step 2: Convert to fraction form
    208,818.40/312,536.40 = 161,816.80/x
  3. Step 3: Cross multiply
    208,818.40x = 312,536.40 × 161,816.80
  4. Step 4: Simplify right side
    208,818.40x = 50,573,640,131.52
  5. Step 5: Solve for x
    x = 50,573,640,131.52/208,818.40
  6. Step 6: Final answer
    x = 242,189.58

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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.