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Finding the Fourth Proportional to 153,189.38, 211,398.31 and 85,204.89

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Solution

The fourth proportional to 153,189.38, 211,398.31 and 85,204.89 is: 117,581.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,189.38 : 211,398.31 = 85,204.89 : x
  2. Step 2: Convert to fraction form
    153,189.38/211,398.31 = 85,204.89/x
  3. Step 3: Cross multiply
    153,189.38x = 211,398.31 × 85,204.89
  4. Step 4: Simplify right side
    153,189.38x = 18,012,169,376.96
  5. Step 5: Solve for x
    x = 18,012,169,376.96/153,189.38
  6. Step 6: Final answer
    x = 117,581.06

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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.