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Finding the Fourth Proportional to 139,804.83, 209,740.50 and 45,043.97

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Solution

The fourth proportional to 139,804.83, 209,740.50 and 45,043.97 is: 67,576.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,804.83 : 209,740.50 = 45,043.97 : x
  2. Step 2: Convert to fraction form
    139,804.83/209,740.50 = 45,043.97/x
  3. Step 3: Cross multiply
    139,804.83x = 209,740.50 × 45,043.97
  4. Step 4: Simplify right side
    139,804.83x = 9,447,543,741.08
  5. Step 5: Solve for x
    x = 9,447,543,741.08/139,804.83
  6. Step 6: Final answer
    x = 67,576.66

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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.