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Finding the Fourth Proportional to 139,310.82, 208,980.81 and 45,823.86

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Solution

The fourth proportional to 139,310.82, 208,980.81 and 45,823.86 is: 68,740.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,310.82 : 208,980.81 = 45,823.86 : x
  2. Step 2: Convert to fraction form
    139,310.82/208,980.81 = 45,823.86/x
  3. Step 3: Cross multiply
    139,310.82x = 208,980.81 × 45,823.86
  4. Step 4: Simplify right side
    139,310.82x = 9,576,307,380.13
  5. Step 5: Solve for x
    x = 9,576,307,380.13/139,310.82
  6. Step 6: Final answer
    x = 68,740.59

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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.