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Finding the Fourth Proportional to 251,941, 347,678.58 and 138,763.75

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Solution

The fourth proportional to 251,941, 347,678.58 and 138,763.75 is: 191,493.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,941 : 347,678.58 = 138,763.75 : x
  2. Step 2: Convert to fraction form
    251,941/347,678.58 = 138,763.75/x
  3. Step 3: Cross multiply
    251,941x = 347,678.58 × 138,763.75
  4. Step 4: Simplify right side
    251,941x = 48,245,183,555.48
  5. Step 5: Solve for x
    x = 48,245,183,555.48/251,941
  6. Step 6: Final answer
    x = 191,493.98

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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.