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Finding the Fourth Proportional to 280,066.76, 420,162.59 and 80,371.58

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Solution

The fourth proportional to 280,066.76, 420,162.59 and 80,371.58 is: 120,575.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,066.76 : 420,162.59 = 80,371.58 : x
  2. Step 2: Convert to fraction form
    280,066.76/420,162.59 = 80,371.58/x
  3. Step 3: Cross multiply
    280,066.76x = 420,162.59 × 80,371.58
  4. Step 4: Simplify right side
    280,066.76x = 33,769,128,712.52
  5. Step 5: Solve for x
    x = 33,769,128,712.52/280,066.76
  6. Step 6: Final answer
    x = 120,575.28

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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.