Home / 121,013.03-167,072.69-78,007.80

Finding the Fourth Proportional to 121,013.03, 167,072.69 and 78,007.80

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Solution

The fourth proportional to 121,013.03, 167,072.69 and 78,007.80 is: 107,698.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,013.03 : 167,072.69 = 78,007.80 : x
  2. Step 2: Convert to fraction form
    121,013.03/167,072.69 = 78,007.80/x
  3. Step 3: Cross multiply
    121,013.03x = 167,072.69 × 78,007.80
  4. Step 4: Simplify right side
    121,013.03x = 13,032,972,986.98
  5. Step 5: Solve for x
    x = 13,032,972,986.98/121,013.03
  6. Step 6: Final answer
    x = 107,698.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.