Home / 139,870.28-209,556.65-80,583.45

Finding the Fourth Proportional to 139,870.28, 209,556.65 and 80,583.45

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Solution

The fourth proportional to 139,870.28, 209,556.65 and 80,583.45 is: 120,731.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,870.28 : 209,556.65 = 80,583.45 : x
  2. Step 2: Convert to fraction form
    139,870.28/209,556.65 = 80,583.45/x
  3. Step 3: Cross multiply
    139,870.28x = 209,556.65 × 80,583.45
  4. Step 4: Simplify right side
    139,870.28x = 16,886,797,827.44
  5. Step 5: Solve for x
    x = 16,886,797,827.44/139,870.28
  6. Step 6: Final answer
    x = 120,731.85

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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.