Home / 80,967.10-121,436.91-21,789.58

Finding the Fourth Proportional to 80,967.10, 121,436.91 and 21,789.58

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Solution

The fourth proportional to 80,967.10, 121,436.91 and 21,789.58 is: 32,680.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,967.10 : 121,436.91 = 21,789.58 : x
  2. Step 2: Convert to fraction form
    80,967.10/121,436.91 = 21,789.58/x
  3. Step 3: Cross multiply
    80,967.10x = 121,436.91 × 21,789.58
  4. Step 4: Simplify right side
    80,967.10x = 2,646,059,265.40
  5. Step 5: Solve for x
    x = 2,646,059,265.40/80,967.10
  6. Step 6: Final answer
    x = 32,680.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.