Home / 154,799.75-213,626.90-87,731.75

Finding the Fourth Proportional to 154,799.75, 213,626.90 and 87,731.75

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Solution

The fourth proportional to 154,799.75, 213,626.90 and 87,731.75 is: 121,071.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,799.75 : 213,626.90 = 87,731.75 : x
  2. Step 2: Convert to fraction form
    154,799.75/213,626.90 = 87,731.75/x
  3. Step 3: Cross multiply
    154,799.75x = 213,626.90 × 87,731.75
  4. Step 4: Simplify right side
    154,799.75x = 18,741,861,784.08
  5. Step 5: Solve for x
    x = 18,741,861,784.08/154,799.75
  6. Step 6: Final answer
    x = 121,071.65

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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.