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Finding the Fourth Proportional to 80,954.70, 121,410.45 and 28,358.70

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Solution

The fourth proportional to 80,954.70, 121,410.45 and 28,358.70 is: 42,530.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,954.70 : 121,410.45 = 28,358.70 : x
  2. Step 2: Convert to fraction form
    80,954.70/121,410.45 = 28,358.70/x
  3. Step 3: Cross multiply
    80,954.70x = 121,410.45 × 28,358.70
  4. Step 4: Simplify right side
    80,954.70x = 3,443,042,528.42
  5. Step 5: Solve for x
    x = 3,443,042,528.42/80,954.70
  6. Step 6: Final answer
    x = 42,530.48

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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.