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Finding the Fourth Proportional to 159,391.60, 219,928.37 and 121,140.97

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Solution

The fourth proportional to 159,391.60, 219,928.37 and 121,140.97 is: 167,150.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,391.60 : 219,928.37 = 121,140.97 : x
  2. Step 2: Convert to fraction form
    159,391.60/219,928.37 = 121,140.97/x
  3. Step 3: Cross multiply
    159,391.60x = 219,928.37 × 121,140.97
  4. Step 4: Simplify right side
    159,391.60x = 26,642,334,916.79
  5. Step 5: Solve for x
    x = 26,642,334,916.79/159,391.60
  6. Step 6: Final answer
    x = 167,150.18

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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.