Home / 100,632.35-138,872.76-55,310.32

Finding the Fourth Proportional to 100,632.35, 138,872.76 and 55,310.32

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Solution

The fourth proportional to 100,632.35, 138,872.76 and 55,310.32 is: 76,328.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,632.35 : 138,872.76 = 55,310.32 : x
  2. Step 2: Convert to fraction form
    100,632.35/138,872.76 = 55,310.32/x
  3. Step 3: Cross multiply
    100,632.35x = 138,872.76 × 55,310.32
  4. Step 4: Simplify right side
    100,632.35x = 7,681,096,794.88
  5. Step 5: Solve for x
    x = 7,681,096,794.88/100,632.35
  6. Step 6: Final answer
    x = 76,328.31

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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.