Home / 80,257.60-120,315.12-38,111.68

Finding the Fourth Proportional to 80,257.60, 120,315.12 and 38,111.68

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Solution

The fourth proportional to 80,257.60, 120,315.12 and 38,111.68 is: 57,133.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,257.60 : 120,315.12 = 38,111.68 : x
  2. Step 2: Convert to fraction form
    80,257.60/120,315.12 = 38,111.68/x
  3. Step 3: Cross multiply
    80,257.60x = 120,315.12 × 38,111.68
  4. Step 4: Simplify right side
    80,257.60x = 4,585,411,352.60
  5. Step 5: Solve for x
    x = 4,585,411,352.60/80,257.60
  6. Step 6: Final answer
    x = 57,133.67

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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.