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Finding the Fourth Proportional to 223,584.60, 308,590.56 and 128,155.20

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Solution

The fourth proportional to 223,584.60, 308,590.56 and 128,155.20 is: 176,879.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,584.60 : 308,590.56 = 128,155.20 : x
  2. Step 2: Convert to fraction form
    223,584.60/308,590.56 = 128,155.20/x
  3. Step 3: Cross multiply
    223,584.60x = 308,590.56 × 128,155.20
  4. Step 4: Simplify right side
    223,584.60x = 39,547,484,934.91
  5. Step 5: Solve for x
    x = 39,547,484,934.91/223,584.60
  6. Step 6: Final answer
    x = 176,879.29

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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.