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Finding the Fourth Proportional to 223,753.89, 308,783.79 and 121,783.40

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Solution

The fourth proportional to 223,753.89, 308,783.79 and 121,783.40 is: 168,062.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,753.89 : 308,783.79 = 121,783.40 : x
  2. Step 2: Convert to fraction form
    223,753.89/308,783.79 = 121,783.40/x
  3. Step 3: Cross multiply
    223,753.89x = 308,783.79 × 121,783.40
  4. Step 4: Simplify right side
    223,753.89x = 37,604,738,267.17
  5. Step 5: Solve for x
    x = 37,604,738,267.17/223,753.89
  6. Step 6: Final answer
    x = 168,062.95

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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.