Home / 81,063.72-111,919.20-55,612.68

Finding the Fourth Proportional to 81,063.72, 111,919.20 and 55,612.68

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Solution

The fourth proportional to 81,063.72, 111,919.20 and 55,612.68 is: 76,780.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,063.72 : 111,919.20 = 55,612.68 : x
  2. Step 2: Convert to fraction form
    81,063.72/111,919.20 = 55,612.68/x
  3. Step 3: Cross multiply
    81,063.72x = 111,919.20 × 55,612.68
  4. Step 4: Simplify right side
    81,063.72x = 6,224,126,655.46
  5. Step 5: Solve for x
    x = 6,224,126,655.46/81,063.72
  6. Step 6: Final answer
    x = 76,780.67

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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.