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Finding the Fourth Proportional to 481,030.69, 721,325.17 and 139,396.45

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Solution

The fourth proportional to 481,030.69, 721,325.17 and 139,396.45 is: 209,030.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,030.69 : 721,325.17 = 139,396.45 : x
  2. Step 2: Convert to fraction form
    481,030.69/721,325.17 = 139,396.45/x
  3. Step 3: Cross multiply
    481,030.69x = 721,325.17 × 139,396.45
  4. Step 4: Simplify right side
    481,030.69x = 100,550,167,993.65
  5. Step 5: Solve for x
    x = 100,550,167,993.65/481,030.69
  6. Step 6: Final answer
    x = 209,030.67

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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.