Home / 107,072.70-160,455.45-78,771.90

Finding the Fourth Proportional to 107,072.70, 160,455.45 and 78,771.90

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Solution

The fourth proportional to 107,072.70, 160,455.45 and 78,771.90 is: 118,044.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,072.70 : 160,455.45 = 78,771.90 : x
  2. Step 2: Convert to fraction form
    107,072.70/160,455.45 = 78,771.90/x
  3. Step 3: Cross multiply
    107,072.70x = 160,455.45 × 78,771.90
  4. Step 4: Simplify right side
    107,072.70x = 12,639,380,661.86
  5. Step 5: Solve for x
    x = 12,639,380,661.86/107,072.70
  6. Step 6: Final answer
    x = 118,044.85

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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.