Home / 139,969,016.40-209,953,524.60-78,747,013.20

Finding the Fourth Proportional to 139,969,016.40, 209,953,524.60 and 78,747,013.20

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Solution

The fourth proportional to 139,969,016.40, 209,953,524.60 and 78,747,013.20 is: 118,120,519.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,016.40 : 209,953,524.60 = 78,747,013.20 : x
  2. Step 2: Convert to fraction form
    139,969,016.40/209,953,524.60 = 78,747,013.20/x
  3. Step 3: Cross multiply
    139,969,016.40x = 209,953,524.60 × 78,747,013.20
  4. Step 4: Simplify right side
    139,969,016.40x = 16,533,212,973,062,724
  5. Step 5: Solve for x
    x = 16,533,212,973,062,724/139,969,016.40
  6. Step 6: Final answer
    x = 118,120,519.80

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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.