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Finding the Fourth Proportional to 139,683.68, 209,490.80 and 39,844.74

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Solution

The fourth proportional to 139,683.68, 209,490.80 and 39,844.74 is: 59,757.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,683.68 : 209,490.80 = 39,844.74 : x
  2. Step 2: Convert to fraction form
    139,683.68/209,490.80 = 39,844.74/x
  3. Step 3: Cross multiply
    139,683.68x = 209,490.80 × 39,844.74
  4. Step 4: Simplify right side
    139,683.68x = 8,347,106,458.39
  5. Step 5: Solve for x
    x = 8,347,106,458.39/139,683.68
  6. Step 6: Final answer
    x = 59,757.21

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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.