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Finding the Fourth Proportional to 153,257.58, 211,493.43 and 86,189.58

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Solution

The fourth proportional to 153,257.58, 211,493.43 and 86,189.58 is: 118,940.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,257.58 : 211,493.43 = 86,189.58 : x
  2. Step 2: Convert to fraction form
    153,257.58/211,493.43 = 86,189.58/x
  3. Step 3: Cross multiply
    153,257.58x = 211,493.43 × 86,189.58
  4. Step 4: Simplify right side
    153,257.58x = 18,228,529,904.46
  5. Step 5: Solve for x
    x = 18,228,529,904.46/153,257.58
  6. Step 6: Final answer
    x = 118,940.48

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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.