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Finding the Fourth Proportional to 139,915.77, 209,935.49 and 73,339.98

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Solution

The fourth proportional to 139,915.77, 209,935.49 and 73,339.98 is: 110,042.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,915.77 : 209,935.49 = 73,339.98 : x
  2. Step 2: Convert to fraction form
    139,915.77/209,935.49 = 73,339.98/x
  3. Step 3: Cross multiply
    139,915.77x = 209,935.49 × 73,339.98
  4. Step 4: Simplify right side
    139,915.77x = 15,396,664,271.19
  5. Step 5: Solve for x
    x = 15,396,664,271.19/139,915.77
  6. Step 6: Final answer
    x = 110,042.38

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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.