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Finding the Fourth Proportional to 117,856.79, 162,659.50 and 66,179.68

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Solution

The fourth proportional to 117,856.79, 162,659.50 and 66,179.68 is: 91,337.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,856.79 : 162,659.50 = 66,179.68 : x
  2. Step 2: Convert to fraction form
    117,856.79/162,659.50 = 66,179.68/x
  3. Step 3: Cross multiply
    117,856.79x = 162,659.50 × 66,179.68
  4. Step 4: Simplify right side
    117,856.79x = 10,764,754,638.70
  5. Step 5: Solve for x
    x = 10,764,754,638.70/117,856.79
  6. Step 6: Final answer
    x = 91,337.59

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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.