Home / 100,329.56-138,454.80-54,389.36

Finding the Fourth Proportional to 100,329.56, 138,454.80 and 54,389.36

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Solution

The fourth proportional to 100,329.56, 138,454.80 and 54,389.36 is: 75,057.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,329.56 : 138,454.80 = 54,389.36 : x
  2. Step 2: Convert to fraction form
    100,329.56/138,454.80 = 54,389.36/x
  3. Step 3: Cross multiply
    100,329.56x = 138,454.80 × 54,389.36
  4. Step 4: Simplify right side
    100,329.56x = 7,530,467,960.93
  5. Step 5: Solve for x
    x = 7,530,467,960.93/100,329.56
  6. Step 6: Final answer
    x = 75,057.32

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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.