Home / 91,638.42-126,464.13-87,439.38

Finding the Fourth Proportional to 91,638.42, 126,464.13 and 87,439.38

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Solution

The fourth proportional to 91,638.42, 126,464.13 and 87,439.38 is: 120,669.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,638.42 : 126,464.13 = 87,439.38 : x
  2. Step 2: Convert to fraction form
    91,638.42/126,464.13 = 87,439.38/x
  3. Step 3: Cross multiply
    91,638.42x = 126,464.13 × 87,439.38
  4. Step 4: Simplify right side
    91,638.42x = 11,057,945,119.44
  5. Step 5: Solve for x
    x = 11,057,945,119.44/91,638.42
  6. Step 6: Final answer
    x = 120,669.31

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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.