Home / 100,974.21-139,342.01-55,035.32

Finding the Fourth Proportional to 100,974.21, 139,342.01 and 55,035.32

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Solution

The fourth proportional to 100,974.21, 139,342.01 and 55,035.32 is: 75,947.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,974.21 : 139,342.01 = 55,035.32 : x
  2. Step 2: Convert to fraction form
    100,974.21/139,342.01 = 55,035.32/x
  3. Step 3: Cross multiply
    100,974.21x = 139,342.01 × 55,035.32
  4. Step 4: Simplify right side
    100,974.21x = 7,668,731,137.91
  5. Step 5: Solve for x
    x = 7,668,731,137.91/100,974.21
  6. Step 6: Final answer
    x = 75,947.42

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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.