Home / 100,111.24-138,183.06-57,699.64

Finding the Fourth Proportional to 100,111.24, 138,183.06 and 57,699.64

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Solution

The fourth proportional to 100,111.24, 138,183.06 and 57,699.64 is: 79,642.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,111.24 : 138,183.06 = 57,699.64 : x
  2. Step 2: Convert to fraction form
    100,111.24/138,183.06 = 57,699.64/x
  3. Step 3: Cross multiply
    100,111.24x = 138,183.06 × 57,699.64
  4. Step 4: Simplify right side
    100,111.24x = 7,973,112,816.10
  5. Step 5: Solve for x
    x = 7,973,112,816.10/100,111.24
  6. Step 6: Final answer
    x = 79,642.53

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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.