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Finding the Fourth Proportional to 153,605.96, 211,951.84 and 86,525

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Solution

The fourth proportional to 153,605.96, 211,951.84 and 86,525 is: 119,390.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,605.96 : 211,951.84 = 86,525 : x
  2. Step 2: Convert to fraction form
    153,605.96/211,951.84 = 86,525/x
  3. Step 3: Cross multiply
    153,605.96x = 211,951.84 × 86,525
  4. Step 4: Simplify right side
    153,605.96x = 18,339,132,956
  5. Step 5: Solve for x
    x = 18,339,132,956/153,605.96
  6. Step 6: Final answer
    x = 119,390.76

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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.