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Finding the Fourth Proportional to 159,239.42, 219,725.31 and 91,243.31

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Solution

The fourth proportional to 159,239.42, 219,725.31 and 91,243.31 is: 125,901.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,239.42 : 219,725.31 = 91,243.31 : x
  2. Step 2: Convert to fraction form
    159,239.42/219,725.31 = 91,243.31/x
  3. Step 3: Cross multiply
    159,239.42x = 219,725.31 × 91,243.31
  4. Step 4: Simplify right side
    159,239.42x = 20,048,464,541.42
  5. Step 5: Solve for x
    x = 20,048,464,541.42/159,239.42
  6. Step 6: Final answer
    x = 125,901.39

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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.