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Finding the Fourth Proportional to 139,645.98, 209,448.21 and 50,878.80

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Solution

The fourth proportional to 139,645.98, 209,448.21 and 50,878.80 is: 76,310.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,645.98 : 209,448.21 = 50,878.80 : x
  2. Step 2: Convert to fraction form
    139,645.98/209,448.21 = 50,878.80/x
  3. Step 3: Cross multiply
    139,645.98x = 209,448.21 × 50,878.80
  4. Step 4: Simplify right side
    139,645.98x = 10,656,473,586.95
  5. Step 5: Solve for x
    x = 10,656,473,586.95/139,645.98
  6. Step 6: Final answer
    x = 76,310.64

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1.5x scale

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.