Home / 72,640.20-100,234.15-42,403.65

Finding the Fourth Proportional to 72,640.20, 100,234.15 and 42,403.65

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Solution

The fourth proportional to 72,640.20, 100,234.15 and 42,403.65 is: 58,511.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,640.20 : 100,234.15 = 42,403.65 : x
  2. Step 2: Convert to fraction form
    72,640.20/100,234.15 = 42,403.65/x
  3. Step 3: Cross multiply
    72,640.20x = 100,234.15 × 42,403.65
  4. Step 4: Simplify right side
    72,640.20x = 4,250,293,814.65
  5. Step 5: Solve for x
    x = 4,250,293,814.65/72,640.20
  6. Step 6: Final answer
    x = 58,511.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.