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Finding the Fourth Proportional to 145,620.31, 218,445.37 and 55,738.54

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Solution

The fourth proportional to 145,620.31, 218,445.37 and 55,738.54 is: 83,613.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,620.31 : 218,445.37 = 55,738.54 : x
  2. Step 2: Convert to fraction form
    145,620.31/218,445.37 = 55,738.54/x
  3. Step 3: Cross multiply
    145,620.31x = 218,445.37 × 55,738.54
  4. Step 4: Simplify right side
    145,620.31x = 12,175,825,993.56
  5. Step 5: Solve for x
    x = 12,175,825,993.56/145,620.31
  6. Step 6: Final answer
    x = 83,613.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.