Home / 100,313.22-138,433.32-54,990.21

Finding the Fourth Proportional to 100,313.22, 138,433.32 and 54,990.21

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Solution

The fourth proportional to 100,313.22, 138,433.32 and 54,990.21 is: 75,887.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,313.22 : 138,433.32 = 54,990.21 : x
  2. Step 2: Convert to fraction form
    100,313.22/138,433.32 = 54,990.21/x
  3. Step 3: Cross multiply
    100,313.22x = 138,433.32 × 54,990.21
  4. Step 4: Simplify right side
    100,313.22x = 7,612,477,337.80
  5. Step 5: Solve for x
    x = 7,612,477,337.80/100,313.22
  6. Step 6: Final answer
    x = 75,887.08

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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.