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Finding the Fourth Proportional to 138,071.61, 207,109.97 and 43,299.68

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Solution

The fourth proportional to 138,071.61, 207,109.97 and 43,299.68 is: 64,950.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,071.61 : 207,109.97 = 43,299.68 : x
  2. Step 2: Convert to fraction form
    138,071.61/207,109.97 = 43,299.68/x
  3. Step 3: Cross multiply
    138,071.61x = 207,109.97 × 43,299.68
  4. Step 4: Simplify right side
    138,071.61x = 8,967,794,173.76
  5. Step 5: Solve for x
    x = 8,967,794,173.76/138,071.61
  6. Step 6: Final answer
    x = 64,950.31

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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.