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Finding the Fourth Proportional to 113,861.70, 170,865.45 and 66,476.70

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Solution

The fourth proportional to 113,861.70, 170,865.45 and 66,476.70 is: 99,757.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,861.70 : 170,865.45 = 66,476.70 : x
  2. Step 2: Convert to fraction form
    113,861.70/170,865.45 = 66,476.70/x
  3. Step 3: Cross multiply
    113,861.70x = 170,865.45 × 66,476.70
  4. Step 4: Simplify right side
    113,861.70x = 11,358,571,260.02
  5. Step 5: Solve for x
    x = 11,358,571,260.02/113,861.70
  6. Step 6: Final answer
    x = 99,757.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.