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Finding the Fourth Proportional to 223,678.98, 308,685.51 and 128,204.10

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Solution

The fourth proportional to 223,678.98, 308,685.51 and 128,204.10 is: 176,926.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,678.98 : 308,685.51 = 128,204.10 : x
  2. Step 2: Convert to fraction form
    223,678.98/308,685.51 = 128,204.10/x
  3. Step 3: Cross multiply
    223,678.98x = 308,685.51 × 128,204.10
  4. Step 4: Simplify right side
    223,678.98x = 39,574,747,992.59
  5. Step 5: Solve for x
    x = 39,574,747,992.59/223,678.98
  6. Step 6: Final answer
    x = 176,926.54

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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.