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Finding the Fourth Proportional to 139,230.80, 208,846.20 and 136,926.80

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Solution

The fourth proportional to 139,230.80, 208,846.20 and 136,926.80 is: 205,390.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,230.80 : 208,846.20 = 136,926.80 : x
  2. Step 2: Convert to fraction form
    139,230.80/208,846.20 = 136,926.80/x
  3. Step 3: Cross multiply
    139,230.80x = 208,846.20 × 136,926.80
  4. Step 4: Simplify right side
    139,230.80x = 28,596,641,858.16
  5. Step 5: Solve for x
    x = 28,596,641,858.16/139,230.80
  6. Step 6: Final answer
    x = 205,390.20

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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.