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Finding the Fourth Proportional to 208,079.70, 312,128.63 and 65,935.45

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Solution

The fourth proportional to 208,079.70, 312,128.63 and 65,935.45 is: 98,906.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,079.70 : 312,128.63 = 65,935.45 : x
  2. Step 2: Convert to fraction form
    208,079.70/312,128.63 = 65,935.45/x
  3. Step 3: Cross multiply
    208,079.70x = 312,128.63 × 65,935.45
  4. Step 4: Simplify right side
    208,079.70x = 20,580,342,355.56
  5. Step 5: Solve for x
    x = 20,580,342,355.56/208,079.70
  6. Step 6: Final answer
    x = 98,906.05

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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.