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Finding the Fourth Proportional to 159,858.71, 220,621.20 and 137,272.47

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Solution

The fourth proportional to 159,858.71, 220,621.20 and 137,272.47 is: 189,449.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,858.71 : 220,621.20 = 137,272.47 : x
  2. Step 2: Convert to fraction form
    159,858.71/220,621.20 = 137,272.47/x
  3. Step 3: Cross multiply
    159,858.71x = 220,621.20 × 137,272.47
  4. Step 4: Simplify right side
    159,858.71x = 30,285,216,488.42
  5. Step 5: Solve for x
    x = 30,285,216,488.42/159,858.71
  6. Step 6: Final answer
    x = 189,449.90

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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.