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Finding the Fourth Proportional to 223,781.64, 308,809.58 and 128,221.89

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Solution

The fourth proportional to 223,781.64, 308,809.58 and 128,221.89 is: 176,941.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,781.64 : 308,809.58 = 128,221.89 : x
  2. Step 2: Convert to fraction form
    223,781.64/308,809.58 = 128,221.89/x
  3. Step 3: Cross multiply
    223,781.64x = 308,809.58 × 128,221.89
  4. Step 4: Simplify right side
    223,781.64x = 39,596,147,356.60
  5. Step 5: Solve for x
    x = 39,596,147,356.60/223,781.64
  6. Step 6: Final answer
    x = 176,941.00

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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.