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Finding the Fourth Proportional to 111,384.84, 153,654.97 and 79,572.19

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Solution

The fourth proportional to 111,384.84, 153,654.97 and 79,572.19 is: 109,769.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,384.84 : 153,654.97 = 79,572.19 : x
  2. Step 2: Convert to fraction form
    111,384.84/153,654.97 = 79,572.19/x
  3. Step 3: Cross multiply
    111,384.84x = 153,654.97 × 79,572.19
  4. Step 4: Simplify right side
    111,384.84x = 12,226,662,467.28
  5. Step 5: Solve for x
    x = 12,226,662,467.28/111,384.84
  6. Step 6: Final answer
    x = 109,769.54

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Half scale
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Double scale
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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.