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Finding the Fourth Proportional to 251,643.40, 347,261.52 and 136,917.16

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Solution

The fourth proportional to 251,643.40, 347,261.52 and 136,917.16 is: 188,942.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,643.40 : 347,261.52 = 136,917.16 : x
  2. Step 2: Convert to fraction form
    251,643.40/347,261.52 = 136,917.16/x
  3. Step 3: Cross multiply
    251,643.40x = 347,261.52 × 136,917.16
  4. Step 4: Simplify right side
    251,643.40x = 47,546,061,095.68
  5. Step 5: Solve for x
    x = 47,546,061,095.68/251,643.40
  6. Step 6: Final answer
    x = 188,942.21

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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.