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Finding the Fourth Proportional to 245,584.70, 338,903.66 and 138,154.70

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Solution

The fourth proportional to 245,584.70, 338,903.66 and 138,154.70 is: 190,651.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,584.70 : 338,903.66 = 138,154.70 : x
  2. Step 2: Convert to fraction form
    245,584.70/338,903.66 = 138,154.70/x
  3. Step 3: Cross multiply
    245,584.70x = 338,903.66 × 138,154.70
  4. Step 4: Simplify right side
    245,584.70x = 46,821,132,785.43
  5. Step 5: Solve for x
    x = 46,821,132,785.43/245,584.70
  6. Step 6: Final answer
    x = 190,651.67

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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.