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Finding the Fourth Proportional to 153,383.71, 211,667.82 and 85,399.21

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Solution

The fourth proportional to 153,383.71, 211,667.82 and 85,399.21 is: 117,849.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,383.71 : 211,667.82 = 85,399.21 : x
  2. Step 2: Convert to fraction form
    153,383.71/211,667.82 = 85,399.21/x
  3. Step 3: Cross multiply
    153,383.71x = 211,667.82 × 85,399.21
  4. Step 4: Simplify right side
    153,383.71x = 18,076,264,610.42
  5. Step 5: Solve for x
    x = 18,076,264,610.42/153,383.71
  6. Step 6: Final answer
    x = 117,849.96

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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.