Home / 159,489.28-220,087.32-87,867.40

Finding the Fourth Proportional to 159,489.28, 220,087.32 and 87,867.40

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Solution

The fourth proportional to 159,489.28, 220,087.32 and 87,867.40 is: 121,252.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,489.28 : 220,087.32 = 87,867.40 : x
  2. Step 2: Convert to fraction form
    159,489.28/220,087.32 = 87,867.40/x
  3. Step 3: Cross multiply
    159,489.28x = 220,087.32 × 87,867.40
  4. Step 4: Simplify right side
    159,489.28x = 19,338,500,581.37
  5. Step 5: Solve for x
    x = 19,338,500,581.37/159,489.28
  6. Step 6: Final answer
    x = 121,252.67

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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.