Home / 81,278.91-111,915.68-71,150.67

Finding the Fourth Proportional to 81,278.91, 111,915.68 and 71,150.67

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Solution

The fourth proportional to 81,278.91, 111,915.68 and 71,150.67 is: 97,969.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,278.91 : 111,915.68 = 71,150.67 : x
  2. Step 2: Convert to fraction form
    81,278.91/111,915.68 = 71,150.67/x
  3. Step 3: Cross multiply
    81,278.91x = 111,915.68 × 71,150.67
  4. Step 4: Simplify right side
    81,278.91x = 7,962,875,259.75
  5. Step 5: Solve for x
    x = 7,962,875,259.75/81,278.91
  6. Step 6: Final answer
    x = 97,969.76

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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.