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Finding the Fourth Proportional to 139,804.30, 209,558.76 and 100,340.02

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Solution

The fourth proportional to 139,804.30, 209,558.76 and 100,340.02 is: 150,404.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,804.30 : 209,558.76 = 100,340.02 : x
  2. Step 2: Convert to fraction form
    139,804.30/209,558.76 = 100,340.02/x
  3. Step 3: Cross multiply
    139,804.30x = 209,558.76 × 100,340.02
  4. Step 4: Simplify right side
    139,804.30x = 21,027,130,169.58
  5. Step 5: Solve for x
    x = 21,027,130,169.58/139,804.30
  6. Step 6: Final answer
    x = 150,404.03

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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.