Home / 280,511.10-420,766.65-90,971.10

Finding the Fourth Proportional to 280,511.10, 420,766.65 and 90,971.10

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Solution

The fourth proportional to 280,511.10, 420,766.65 and 90,971.10 is: 136,456.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,511.10 : 420,766.65 = 90,971.10 : x
  2. Step 2: Convert to fraction form
    280,511.10/420,766.65 = 90,971.10/x
  3. Step 3: Cross multiply
    280,511.10x = 420,766.65 × 90,971.10
  4. Step 4: Simplify right side
    280,511.10x = 38,277,604,993.82
  5. Step 5: Solve for x
    x = 38,277,604,993.82/280,511.10
  6. Step 6: Final answer
    x = 136,456.65

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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.