Home / 100,155.20-138,215.81-54,832.43

Finding the Fourth Proportional to 100,155.20, 138,215.81 and 54,832.43

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Solution

The fourth proportional to 100,155.20, 138,215.81 and 54,832.43 is: 75,669.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,155.20 : 138,215.81 = 54,832.43 : x
  2. Step 2: Convert to fraction form
    100,155.20/138,215.81 = 54,832.43/x
  3. Step 3: Cross multiply
    100,155.20x = 138,215.81 × 54,832.43
  4. Step 4: Simplify right side
    100,155.20x = 7,578,708,172.72
  5. Step 5: Solve for x
    x = 7,578,708,172.72/100,155.20
  6. Step 6: Final answer
    x = 75,669.64

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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.