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Finding the Fourth Proportional to 153,306.90, 211,563.21 and 86,238.90

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Solution

The fourth proportional to 153,306.90, 211,563.21 and 86,238.90 is: 119,009.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,306.90 : 211,563.21 = 86,238.90 : x
  2. Step 2: Convert to fraction form
    153,306.90/211,563.21 = 86,238.90/x
  3. Step 3: Cross multiply
    153,306.90x = 211,563.21 × 86,238.90
  4. Step 4: Simplify right side
    153,306.90x = 18,244,978,510.87
  5. Step 5: Solve for x
    x = 18,244,978,510.87/153,306.90
  6. Step 6: Final answer
    x = 119,009.51

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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.