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Finding the Fourth Proportional to 159,173.30, 219,690.36 and 91,235.81

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Solution

The fourth proportional to 159,173.30, 219,690.36 and 91,235.81 is: 125,923.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,173.30 : 219,690.36 = 91,235.81 : x
  2. Step 2: Convert to fraction form
    159,173.30/219,690.36 = 91,235.81/x
  3. Step 3: Cross multiply
    159,173.30x = 219,690.36 × 91,235.81
  4. Step 4: Simplify right side
    159,173.30x = 20,043,626,845.34
  5. Step 5: Solve for x
    x = 20,043,626,845.34/159,173.30
  6. Step 6: Final answer
    x = 125,923.30

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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.