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Finding the Fourth Proportional to 320,660.76, 481,006.64 and 84,003.67

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Solution

The fourth proportional to 320,660.76, 481,006.64 and 84,003.67 is: 126,009.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,660.76 : 481,006.64 = 84,003.67 : x
  2. Step 2: Convert to fraction form
    320,660.76/481,006.64 = 84,003.67/x
  3. Step 3: Cross multiply
    320,660.76x = 481,006.64 × 84,003.67
  4. Step 4: Simplify right side
    320,660.76x = 40,406,323,054.37
  5. Step 5: Solve for x
    x = 40,406,323,054.37/320,660.76
  6. Step 6: Final answer
    x = 126,009.57

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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.