Home / 100,209.32-138,286.74-54,885.08

Finding the Fourth Proportional to 100,209.32, 138,286.74 and 54,885.08

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Solution

The fourth proportional to 100,209.32, 138,286.74 and 54,885.08 is: 75,740.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,209.32 : 138,286.74 = 54,885.08 : x
  2. Step 2: Convert to fraction form
    100,209.32/138,286.74 = 54,885.08/x
  3. Step 3: Cross multiply
    100,209.32x = 138,286.74 × 54,885.08
  4. Step 4: Simplify right side
    100,209.32x = 7,589,878,787.84
  5. Step 5: Solve for x
    x = 7,589,878,787.84/100,209.32
  6. Step 6: Final answer
    x = 75,740.25

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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.