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Finding the Fourth Proportional to 223,816.54, 308,908.23 and 128,323.90

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Solution

The fourth proportional to 223,816.54, 308,908.23 and 128,323.90 is: 177,110.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,816.54 : 308,908.23 = 128,323.90 : x
  2. Step 2: Convert to fraction form
    223,816.54/308,908.23 = 128,323.90/x
  3. Step 3: Cross multiply
    223,816.54x = 308,908.23 × 128,323.90
  4. Step 4: Simplify right side
    223,816.54x = 39,640,308,815.70
  5. Step 5: Solve for x
    x = 39,640,308,815.70/223,816.54
  6. Step 6: Final answer
    x = 177,110.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.