Home / 85,376.11-128,049.72-31,329.67

Finding the Fourth Proportional to 85,376.11, 128,049.72 and 31,329.67

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Solution

The fourth proportional to 85,376.11, 128,049.72 and 31,329.67 is: 46,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,376.11 : 128,049.72 = 31,329.67 : x
  2. Step 2: Convert to fraction form
    85,376.11/128,049.72 = 31,329.67/x
  3. Step 3: Cross multiply
    85,376.11x = 128,049.72 × 31,329.67
  4. Step 4: Simplify right side
    85,376.11x = 4,011,755,471.19
  5. Step 5: Solve for x
    x = 4,011,755,471.19/85,376.11
  6. Step 6: Final answer
    x = 46,989.20

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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.