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Finding the Fourth Proportional to 223,865.80, 308,925.84 and 128,306.32

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Solution

The fourth proportional to 223,865.80, 308,925.84 and 128,306.32 is: 177,057.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,865.80 : 308,925.84 = 128,306.32 : x
  2. Step 2: Convert to fraction form
    223,865.80/308,925.84 = 128,306.32/x
  3. Step 3: Cross multiply
    223,865.80x = 308,925.84 × 128,306.32
  4. Step 4: Simplify right side
    223,865.80x = 39,637,137,683.31
  5. Step 5: Solve for x
    x = 39,637,137,683.31/223,865.80
  6. Step 6: Final answer
    x = 177,057.58

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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.