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Finding the Fourth Proportional to 153,020.77, 211,173.79 and 85,040.61

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Solution

The fourth proportional to 153,020.77, 211,173.79 and 85,040.61 is: 117,358.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,020.77 : 211,173.79 = 85,040.61 : x
  2. Step 2: Convert to fraction form
    153,020.77/211,173.79 = 85,040.61/x
  3. Step 3: Cross multiply
    153,020.77x = 211,173.79 × 85,040.61
  4. Step 4: Simplify right side
    153,020.77x = 17,958,347,917.61
  5. Step 5: Solve for x
    x = 17,958,347,917.61/153,020.77
  6. Step 6: Final answer
    x = 117,358.90

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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.