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Finding the Fourth Proportional to 139,243.71, 208,873.62 and 39,395.54

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Solution

The fourth proportional to 139,243.71, 208,873.62 and 39,395.54 is: 59,095.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,243.71 : 208,873.62 = 39,395.54 : x
  2. Step 2: Convert to fraction form
    139,243.71/208,873.62 = 39,395.54/x
  3. Step 3: Cross multiply
    139,243.71x = 208,873.62 × 39,395.54
  4. Step 4: Simplify right side
    139,243.71x = 8,228,689,051.65
  5. Step 5: Solve for x
    x = 8,228,689,051.65/139,243.71
  6. Step 6: Final answer
    x = 59,095.59

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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.