Home / 139,589,712.40-209,384,568.60-78,367,709.20

Finding the Fourth Proportional to 139,589,712.40, 209,384,568.60 and 78,367,709.20

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Solution

The fourth proportional to 139,589,712.40, 209,384,568.60 and 78,367,709.20 is: 117,551,563.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,589,712.40 : 209,384,568.60 = 78,367,709.20 : x
  2. Step 2: Convert to fraction form
    139,589,712.40/209,384,568.60 = 78,367,709.20/x
  3. Step 3: Cross multiply
    139,589,712.40x = 209,384,568.60 × 78,367,709.20
  4. Step 4: Simplify right side
    139,589,712.40x = 16,408,988,983,012,252
  5. Step 5: Solve for x
    x = 16,408,988,983,012,252/139,589,712.40
  6. Step 6: Final answer
    x = 117,551,563.80

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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.