Home / 280,550.80-420,885.38-90,996.45

Finding the Fourth Proportional to 280,550.80, 420,885.38 and 90,996.45

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Solution

The fourth proportional to 280,550.80, 420,885.38 and 90,996.45 is: 136,513.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,550.80 : 420,885.38 = 90,996.45 : x
  2. Step 2: Convert to fraction form
    280,550.80/420,885.38 = 90,996.45/x
  3. Step 3: Cross multiply
    280,550.80x = 420,885.38 × 90,996.45
  4. Step 4: Simplify right side
    280,550.80x = 38,299,072,877.49
  5. Step 5: Solve for x
    x = 38,299,072,877.49/280,550.80
  6. Step 6: Final answer
    x = 136,513.86

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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.