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Finding the Fourth Proportional to 139,288.95, 208,905.66 and 68,181.03

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Solution

The fourth proportional to 139,288.95, 208,905.66 and 68,181.03 is: 102,257.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,288.95 : 208,905.66 = 68,181.03 : x
  2. Step 2: Convert to fraction form
    139,288.95/208,905.66 = 68,181.03/x
  3. Step 3: Cross multiply
    139,288.95x = 208,905.66 × 68,181.03
  4. Step 4: Simplify right side
    139,288.95x = 14,243,403,071.63
  5. Step 5: Solve for x
    x = 14,243,403,071.63/139,288.95
  6. Step 6: Final answer
    x = 102,257.95

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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.