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Finding the Fourth Proportional to 251,993.81, 347,734.95 and 138,816.56

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Solution

The fourth proportional to 251,993.81, 347,734.95 and 138,816.56 is: 191,557.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,993.81 : 347,734.95 = 138,816.56 : x
  2. Step 2: Convert to fraction form
    251,993.81/347,734.95 = 138,816.56/x
  3. Step 3: Cross multiply
    251,993.81x = 347,734.95 × 138,816.56
  4. Step 4: Simplify right side
    251,993.81x = 48,271,369,550.77
  5. Step 5: Solve for x
    x = 48,271,369,550.77/251,993.81
  6. Step 6: Final answer
    x = 191,557.76

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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.