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Finding the Fourth Proportional to 159,168.56, 219,683.81 and 91,231.07

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Solution

The fourth proportional to 159,168.56, 219,683.81 and 91,231.07 is: 125,916.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,168.56 : 219,683.81 = 91,231.07 : x
  2. Step 2: Convert to fraction form
    159,168.56/219,683.81 = 91,231.07/x
  3. Step 3: Cross multiply
    159,168.56x = 219,683.81 × 91,231.07
  4. Step 4: Simplify right side
    159,168.56x = 20,041,989,825.26
  5. Step 5: Solve for x
    x = 20,041,989,825.26/159,168.56
  6. Step 6: Final answer
    x = 125,916.76

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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.