Home / 103,619.04-143,040.56-79,736.80

Finding the Fourth Proportional to 103,619.04, 143,040.56 and 79,736.80

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Solution

The fourth proportional to 103,619.04, 143,040.56 and 79,736.80 is: 110,072.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,619.04 : 143,040.56 = 79,736.80 : x
  2. Step 2: Convert to fraction form
    103,619.04/143,040.56 = 79,736.80/x
  3. Step 3: Cross multiply
    103,619.04x = 143,040.56 × 79,736.80
  4. Step 4: Simplify right side
    103,619.04x = 11,405,596,524.61
  5. Step 5: Solve for x
    x = 11,405,596,524.61/103,619.04
  6. Step 6: Final answer
    x = 110,072.40

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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.