Home / 137,715.20-190,087.68-81,144.80

Finding the Fourth Proportional to 137,715.20, 190,087.68 and 81,144.80

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Solution

The fourth proportional to 137,715.20, 190,087.68 and 81,144.80 is: 112,003.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,715.20 : 190,087.68 = 81,144.80 : x
  2. Step 2: Convert to fraction form
    137,715.20/190,087.68 = 81,144.80/x
  3. Step 3: Cross multiply
    137,715.20x = 190,087.68 × 81,144.80
  4. Step 4: Simplify right side
    137,715.20x = 15,424,626,776.06
  5. Step 5: Solve for x
    x = 15,424,626,776.06/137,715.20
  6. Step 6: Final answer
    x = 112,003.81

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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.