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Finding the Fourth Proportional to 159,856.79, 220,609.71 and 91,895.76

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Solution

The fourth proportional to 159,856.79, 220,609.71 and 91,895.76 is: 126,820.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,856.79 : 220,609.71 = 91,895.76 : x
  2. Step 2: Convert to fraction form
    159,856.79/220,609.71 = 91,895.76/x
  3. Step 3: Cross multiply
    159,856.79x = 220,609.71 × 91,895.76
  4. Step 4: Simplify right side
    159,856.79x = 20,273,096,963.83
  5. Step 5: Solve for x
    x = 20,273,096,963.83/159,856.79
  6. Step 6: Final answer
    x = 126,820.37

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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.