Home / 138,338.28-190,913.22-77,928.12

Finding the Fourth Proportional to 138,338.28, 190,913.22 and 77,928.12

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Solution

The fourth proportional to 138,338.28, 190,913.22 and 77,928.12 is: 107,544.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,338.28 : 190,913.22 = 77,928.12 : x
  2. Step 2: Convert to fraction form
    138,338.28/190,913.22 = 77,928.12/x
  3. Step 3: Cross multiply
    138,338.28x = 190,913.22 × 77,928.12
  4. Step 4: Simplify right side
    138,338.28x = 14,877,508,317.75
  5. Step 5: Solve for x
    x = 14,877,508,317.75/138,338.28
  6. Step 6: Final answer
    x = 107,544.41

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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.