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Finding the Fourth Proportional to 251,559.70, 347,157.78 and 138,382.45

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Solution

The fourth proportional to 251,559.70, 347,157.78 and 138,382.45 is: 190,970.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,559.70 : 347,157.78 = 138,382.45 : x
  2. Step 2: Convert to fraction form
    251,559.70/347,157.78 = 138,382.45/x
  3. Step 3: Cross multiply
    251,559.70x = 347,157.78 × 138,382.45
  4. Step 4: Simplify right side
    251,559.70x = 48,040,544,132.96
  5. Step 5: Solve for x
    x = 48,040,544,132.96/251,559.70
  6. Step 6: Final answer
    x = 190,970.75

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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.