Home / 86,922-120,009.97-66,742.67

Finding the Fourth Proportional to 86,922, 120,009.97 and 66,742.67

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Solution

The fourth proportional to 86,922, 120,009.97 and 66,742.67 is: 92,149.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,922 : 120,009.97 = 66,742.67 : x
  2. Step 2: Convert to fraction form
    86,922/120,009.97 = 66,742.67/x
  3. Step 3: Cross multiply
    86,922x = 120,009.97 × 66,742.67
  4. Step 4: Simplify right side
    86,922x = 8,009,785,824.42
  5. Step 5: Solve for x
    x = 8,009,785,824.42/86,922
  6. Step 6: Final answer
    x = 92,149.12

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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.