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Finding the Fourth Proportional to 223,451.79, 308,429.97 and 128,022.06

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Solution

The fourth proportional to 223,451.79, 308,429.97 and 128,022.06 is: 176,708.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,451.79 : 308,429.97 = 128,022.06 : x
  2. Step 2: Convert to fraction form
    223,451.79/308,429.97 = 128,022.06/x
  3. Step 3: Cross multiply
    223,451.79x = 308,429.97 × 128,022.06
  4. Step 4: Simplify right side
    223,451.79x = 39,485,840,125.14
  5. Step 5: Solve for x
    x = 39,485,840,125.14/223,451.79
  6. Step 6: Final answer
    x = 176,708.54

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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.