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Finding the Fourth Proportional to 217,989.51, 326,511.05 and 105,433.70

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Solution

The fourth proportional to 217,989.51, 326,511.05 and 105,433.70 is: 157,921.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,989.51 : 326,511.05 = 105,433.70 : x
  2. Step 2: Convert to fraction form
    217,989.51/326,511.05 = 105,433.70/x
  3. Step 3: Cross multiply
    217,989.51x = 326,511.05 × 105,433.70
  4. Step 4: Simplify right side
    217,989.51x = 34,425,268,092.39
  5. Step 5: Solve for x
    x = 34,425,268,092.39/217,989.51
  6. Step 6: Final answer
    x = 157,921.67

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1.5x scale

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.