Home / 319,930.74-479,983.77-139,983.54

Finding the Fourth Proportional to 319,930.74, 479,983.77 and 139,983.54

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Solution

The fourth proportional to 319,930.74, 479,983.77 and 139,983.54 is: 210,013.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,930.74 : 479,983.77 = 139,983.54 : x
  2. Step 2: Convert to fraction form
    319,930.74/479,983.77 = 139,983.54/x
  3. Step 3: Cross multiply
    319,930.74x = 479,983.77 × 139,983.54
  4. Step 4: Simplify right side
    319,930.74x = 67,189,827,267.15
  5. Step 5: Solve for x
    x = 67,189,827,267.15/319,930.74
  6. Step 6: Final answer
    x = 210,013.67

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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.