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Finding the Fourth Proportional to 138,485.69, 207,756.47 and 43,730.67

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Solution

The fourth proportional to 138,485.69, 207,756.47 and 43,730.67 is: 65,604.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,485.69 : 207,756.47 = 43,730.67 : x
  2. Step 2: Convert to fraction form
    138,485.69/207,756.47 = 43,730.67/x
  3. Step 3: Cross multiply
    138,485.69x = 207,756.47 × 43,730.67
  4. Step 4: Simplify right side
    138,485.69x = 9,085,329,739.26
  5. Step 5: Solve for x
    x = 9,085,329,739.26/138,485.69
  6. Step 6: Final answer
    x = 65,604.83

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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.