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Finding the Fourth Proportional to 139,168.68, 208,766.69 and 39,329.64

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Solution

The fourth proportional to 139,168.68, 208,766.69 and 39,329.64 is: 58,998.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,168.68 : 208,766.69 = 39,329.64 : x
  2. Step 2: Convert to fraction form
    139,168.68/208,766.69 = 39,329.64/x
  3. Step 3: Cross multiply
    139,168.68x = 208,766.69 × 39,329.64
  4. Step 4: Simplify right side
    139,168.68x = 8,210,718,565.04
  5. Step 5: Solve for x
    x = 8,210,718,565.04/139,168.68
  6. Step 6: Final answer
    x = 58,998.32

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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.