Home / 91,439.28-137,158.92-29,109.78

Finding the Fourth Proportional to 91,439.28, 137,158.92 and 29,109.78

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Solution

The fourth proportional to 91,439.28, 137,158.92 and 29,109.78 is: 43,664.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,439.28 : 137,158.92 = 29,109.78 : x
  2. Step 2: Convert to fraction form
    91,439.28/137,158.92 = 29,109.78/x
  3. Step 3: Cross multiply
    91,439.28x = 137,158.92 × 29,109.78
  4. Step 4: Simplify right side
    91,439.28x = 3,992,665,986.24
  5. Step 5: Solve for x
    x = 3,992,665,986.24/91,439.28
  6. Step 6: Final answer
    x = 43,664.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.