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Finding the Fourth Proportional to 221,030.27, 305,021.81 and 120,428.27

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Solution

The fourth proportional to 221,030.27, 305,021.81 and 120,428.27 is: 166,191.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,030.27 : 305,021.81 = 120,428.27 : x
  2. Step 2: Convert to fraction form
    221,030.27/305,021.81 = 120,428.27/x
  3. Step 3: Cross multiply
    221,030.27x = 305,021.81 × 120,428.27
  4. Step 4: Simplify right side
    221,030.27x = 36,733,248,890.57
  5. Step 5: Solve for x
    x = 36,733,248,890.57/221,030.27
  6. Step 6: Final answer
    x = 166,191.03

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1.5x scale

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.