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Finding the Fourth Proportional to 139,531.36, 209,267.52 and 46,014.88

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Solution

The fourth proportional to 139,531.36, 209,267.52 and 46,014.88 is: 69,012.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,531.36 : 209,267.52 = 46,014.88 : x
  2. Step 2: Convert to fraction form
    139,531.36/209,267.52 = 46,014.88/x
  3. Step 3: Cross multiply
    139,531.36x = 209,267.52 × 46,014.88
  4. Step 4: Simplify right side
    139,531.36x = 9,629,419,820.70
  5. Step 5: Solve for x
    x = 9,629,419,820.70/139,531.36
  6. Step 6: Final answer
    x = 69,012.58

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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.