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Finding the Fourth Proportional to 153,238.52, 211,349.34 and 99,540.84

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Solution

The fourth proportional to 153,238.52, 211,349.34 and 99,540.84 is: 137,288.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,238.52 : 211,349.34 = 99,540.84 : x
  2. Step 2: Convert to fraction form
    153,238.52/211,349.34 = 99,540.84/x
  3. Step 3: Cross multiply
    153,238.52x = 211,349.34 × 99,540.84
  4. Step 4: Simplify right side
    153,238.52x = 21,037,890,837.05
  5. Step 5: Solve for x
    x = 21,037,890,837.05/153,238.52
  6. Step 6: Final answer
    x = 137,288.53

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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.