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Finding the Fourth Proportional to 111,219.97, 153,553.28 and 85,678.24

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Solution

The fourth proportional to 111,219.97, 153,553.28 and 85,678.24 is: 118,289.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,219.97 : 153,553.28 = 85,678.24 : x
  2. Step 2: Convert to fraction form
    111,219.97/153,553.28 = 85,678.24/x
  3. Step 3: Cross multiply
    111,219.97x = 153,553.28 × 85,678.24
  4. Step 4: Simplify right side
    111,219.97x = 13,156,174,776.63
  5. Step 5: Solve for x
    x = 13,156,174,776.63/111,219.97
  6. Step 6: Final answer
    x = 118,289.68

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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.