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Finding the Fourth Proportional to 139,678.73, 209,516.96 and 92,504.93

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Solution

The fourth proportional to 139,678.73, 209,516.96 and 92,504.93 is: 138,756.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,678.73 : 209,516.96 = 92,504.93 : x
  2. Step 2: Convert to fraction form
    139,678.73/209,516.96 = 92,504.93/x
  3. Step 3: Cross multiply
    139,678.73x = 209,516.96 × 92,504.93
  4. Step 4: Simplify right side
    139,678.73x = 19,381,352,473.67
  5. Step 5: Solve for x
    x = 19,381,352,473.67/139,678.73
  6. Step 6: Final answer
    x = 138,756.65

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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.