Home / 280,116.28-420,050.48-80,390.33

Finding the Fourth Proportional to 280,116.28, 420,050.48 and 80,390.33

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Solution

The fourth proportional to 280,116.28, 420,050.48 and 80,390.33 is: 120,549.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,116.28 : 420,050.48 = 80,390.33 : x
  2. Step 2: Convert to fraction form
    280,116.28/420,050.48 = 80,390.33/x
  3. Step 3: Cross multiply
    280,116.28x = 420,050.48 × 80,390.33
  4. Step 4: Simplify right side
    280,116.28x = 33,767,996,703.86
  5. Step 5: Solve for x
    x = 33,767,996,703.86/280,116.28
  6. Step 6: Final answer
    x = 120,549.93

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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.