Home / 100,216.39-138,310.28-57,776.44

Finding the Fourth Proportional to 100,216.39, 138,310.28 and 57,776.44

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Solution

The fourth proportional to 100,216.39, 138,310.28 and 57,776.44 is: 79,738.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,216.39 : 138,310.28 = 57,776.44 : x
  2. Step 2: Convert to fraction form
    100,216.39/138,310.28 = 57,776.44/x
  3. Step 3: Cross multiply
    100,216.39x = 138,310.28 × 57,776.44
  4. Step 4: Simplify right side
    100,216.39x = 7,991,075,392.47
  5. Step 5: Solve for x
    x = 7,991,075,392.47/100,216.39
  6. Step 6: Final answer
    x = 79,738.21

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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.