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Finding the Fourth Proportional to 159,641.64, 219,900.42 and 121,850.28

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Solution

The fourth proportional to 159,641.64, 219,900.42 and 121,850.28 is: 167,844.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,641.64 : 219,900.42 = 121,850.28 : x
  2. Step 2: Convert to fraction form
    159,641.64/219,900.42 = 121,850.28/x
  3. Step 3: Cross multiply
    159,641.64x = 219,900.42 × 121,850.28
  4. Step 4: Simplify right side
    159,641.64x = 26,794,927,749.12
  5. Step 5: Solve for x
    x = 26,794,927,749.12/159,641.64
  6. Step 6: Final answer
    x = 167,844.23

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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.