Home / 279,968.94-420,037.20-90,459.09

Finding the Fourth Proportional to 279,968.94, 420,037.20 and 90,459.09

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Solution

The fourth proportional to 279,968.94, 420,037.20 and 90,459.09 is: 135,715.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,968.94 : 420,037.20 = 90,459.09 : x
  2. Step 2: Convert to fraction form
    279,968.94/420,037.20 = 90,459.09/x
  3. Step 3: Cross multiply
    279,968.94x = 420,037.20 × 90,459.09
  4. Step 4: Simplify right side
    279,968.94x = 37,996,182,878.15
  5. Step 5: Solve for x
    x = 37,996,182,878.15/279,968.94
  6. Step 6: Final answer
    x = 135,715.71

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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.