Home / 118,222.38-177,408.09-78,807.78

Finding the Fourth Proportional to 118,222.38, 177,408.09 and 78,807.78

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Solution

The fourth proportional to 118,222.38, 177,408.09 and 78,807.78 is: 118,261.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,222.38 : 177,408.09 = 78,807.78 : x
  2. Step 2: Convert to fraction form
    118,222.38/177,408.09 = 78,807.78/x
  3. Step 3: Cross multiply
    118,222.38x = 177,408.09 × 78,807.78
  4. Step 4: Simplify right side
    118,222.38x = 13,981,137,726.94
  5. Step 5: Solve for x
    x = 13,981,137,726.94/118,222.38
  6. Step 6: Final answer
    x = 118,261.35

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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.