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Finding the Fourth Proportional to 251,485.56, 347,057.34 and 138,315.60

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Solution

The fourth proportional to 251,485.56, 347,057.34 and 138,315.60 is: 190,879.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,485.56 : 347,057.34 = 138,315.60 : x
  2. Step 2: Convert to fraction form
    251,485.56/347,057.34 = 138,315.60/x
  3. Step 3: Cross multiply
    251,485.56x = 347,057.34 × 138,315.60
  4. Step 4: Simplify right side
    251,485.56x = 48,003,444,216.50
  5. Step 5: Solve for x
    x = 48,003,444,216.50/251,485.56
  6. Step 6: Final answer
    x = 190,879.52

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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.