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Finding the Fourth Proportional to 208,608.70, 312,913.05 and 125,664.70

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Solution

The fourth proportional to 208,608.70, 312,913.05 and 125,664.70 is: 188,497.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,608.70 : 312,913.05 = 125,664.70 : x
  2. Step 2: Convert to fraction form
    208,608.70/312,913.05 = 125,664.70/x
  3. Step 3: Cross multiply
    208,608.70x = 312,913.05 × 125,664.70
  4. Step 4: Simplify right side
    208,608.70x = 39,322,124,554.34
  5. Step 5: Solve for x
    x = 39,322,124,554.34/208,608.70
  6. Step 6: Final answer
    x = 188,497.05

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1.5x scale

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.