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Finding the Fourth Proportional to 139,297.96, 208,919.16 and 68,190.04

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Solution

The fourth proportional to 139,297.96, 208,919.16 and 68,190.04 is: 102,271.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,297.96 : 208,919.16 = 68,190.04 : x
  2. Step 2: Convert to fraction form
    139,297.96/208,919.16 = 68,190.04/x
  3. Step 3: Cross multiply
    139,297.96x = 208,919.16 × 68,190.04
  4. Step 4: Simplify right side
    139,297.96x = 14,246,205,877.17
  5. Step 5: Solve for x
    x = 14,246,205,877.17/139,297.96
  6. Step 6: Final answer
    x = 102,271.46

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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.