Home / 112,039.14-154,653.66-100,081.72

Finding the Fourth Proportional to 112,039.14, 154,653.66 and 100,081.72

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Solution

The fourth proportional to 112,039.14, 154,653.66 and 100,081.72 is: 138,148.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,039.14 : 154,653.66 = 100,081.72 : x
  2. Step 2: Convert to fraction form
    112,039.14/154,653.66 = 100,081.72/x
  3. Step 3: Cross multiply
    112,039.14x = 154,653.66 × 100,081.72
  4. Step 4: Simplify right side
    112,039.14x = 15,478,004,297.10
  5. Step 5: Solve for x
    x = 15,478,004,297.10/112,039.14
  6. Step 6: Final answer
    x = 138,148.19

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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.