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Finding the Fourth Proportional to 139,735.52, 209,488.32 and 79,696.64

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Solution

The fourth proportional to 139,735.52, 209,488.32 and 79,696.64 is: 119,479.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,735.52 : 209,488.32 = 79,696.64 : x
  2. Step 2: Convert to fraction form
    139,735.52/209,488.32 = 79,696.64/x
  3. Step 3: Cross multiply
    139,735.52x = 209,488.32 × 79,696.64
  4. Step 4: Simplify right side
    139,735.52x = 16,695,515,223.24
  5. Step 5: Solve for x
    x = 16,695,515,223.24/139,735.52
  6. Step 6: Final answer
    x = 119,479.39

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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.