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Finding the Fourth Proportional to 159,167.81, 219,682.78 and 91,230.32

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Solution

The fourth proportional to 159,167.81, 219,682.78 and 91,230.32 is: 125,915.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,167.81 : 219,682.78 = 91,230.32 : x
  2. Step 2: Convert to fraction form
    159,167.81/219,682.78 = 91,230.32/x
  3. Step 3: Cross multiply
    159,167.81x = 219,682.78 × 91,230.32
  4. Step 4: Simplify right side
    159,167.81x = 20,041,728,991.40
  5. Step 5: Solve for x
    x = 20,041,728,991.40/159,167.81
  6. Step 6: Final answer
    x = 125,915.72

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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.