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Finding the Fourth Proportional to 251,693.44, 347,339.40 and 138,518.80

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Solution

The fourth proportional to 251,693.44, 347,339.40 and 138,518.80 is: 191,157.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,693.44 : 347,339.40 = 138,518.80 : x
  2. Step 2: Convert to fraction form
    251,693.44/347,339.40 = 138,518.80/x
  3. Step 3: Cross multiply
    251,693.44x = 347,339.40 × 138,518.80
  4. Step 4: Simplify right side
    251,693.44x = 48,113,036,880.72
  5. Step 5: Solve for x
    x = 48,113,036,880.72/251,693.44
  6. Step 6: Final answer
    x = 191,157.29

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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.