Home / 280,553.55-420,889.50-90,999.19

Finding the Fourth Proportional to 280,553.55, 420,889.50 and 90,999.19

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Solution

The fourth proportional to 280,553.55, 420,889.50 and 90,999.19 is: 136,517.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,553.55 : 420,889.50 = 90,999.19 : x
  2. Step 2: Convert to fraction form
    280,553.55/420,889.50 = 90,999.19/x
  3. Step 3: Cross multiply
    280,553.55x = 420,889.50 × 90,999.19
  4. Step 4: Simplify right side
    280,553.55x = 38,300,603,579.51
  5. Step 5: Solve for x
    x = 38,300,603,579.51/280,553.55
  6. Step 6: Final answer
    x = 136,517.98

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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.