Home / 100,943.19-139,300.94-55,620.15

Finding the Fourth Proportional to 100,943.19, 139,300.94 and 55,620.15

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Solution

The fourth proportional to 100,943.19, 139,300.94 and 55,620.15 is: 76,755.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,943.19 : 139,300.94 = 55,620.15 : x
  2. Step 2: Convert to fraction form
    100,943.19/139,300.94 = 55,620.15/x
  3. Step 3: Cross multiply
    100,943.19x = 139,300.94 × 55,620.15
  4. Step 4: Simplify right side
    100,943.19x = 7,747,938,899.84
  5. Step 5: Solve for x
    x = 7,747,938,899.84/100,943.19
  6. Step 6: Final answer
    x = 76,755.44

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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.