Home / 80,683,391.70-120,395,803.79-71,987,715.69

Finding the Fourth Proportional to 80,683,391.70, 120,395,803.79 and 71,987,715.69

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Solution

The fourth proportional to 80,683,391.70, 120,395,803.79 and 71,987,715.69 is: 107,420,111.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,683,391.70 : 120,395,803.79 = 71,987,715.69 : x
  2. Step 2: Convert to fraction form
    80,683,391.70/120,395,803.79 = 71,987,715.69/x
  3. Step 3: Cross multiply
    80,683,391.70x = 120,395,803.79 × 71,987,715.69
  4. Step 4: Simplify right side
    80,683,391.70x = 8,667,018,893,143,605
  5. Step 5: Solve for x
    x = 8,667,018,893,143,605/80,683,391.70
  6. Step 6: Final answer
    x = 107,420,111.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.