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Finding the Fourth Proportional to 139,008, 208,550.40 and 40,512

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Solution

The fourth proportional to 139,008, 208,550.40 and 40,512 is: 60,779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,008 : 208,550.40 = 40,512 : x
  2. Step 2: Convert to fraction form
    139,008/208,550.40 = 40,512/x
  3. Step 3: Cross multiply
    139,008x = 208,550.40 × 40,512
  4. Step 4: Simplify right side
    139,008x = 8,448,793,804.80
  5. Step 5: Solve for x
    x = 8,448,793,804.80/139,008
  6. Step 6: Final answer
    x = 60,779.19

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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.