Home / 100,766.37-139,115.19-66,820.98

Finding the Fourth Proportional to 100,766.37, 139,115.19 and 66,820.98

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Solution

The fourth proportional to 100,766.37, 139,115.19 and 66,820.98 is: 92,251.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,766.37 : 139,115.19 = 66,820.98 : x
  2. Step 2: Convert to fraction form
    100,766.37/139,115.19 = 66,820.98/x
  3. Step 3: Cross multiply
    100,766.37x = 139,115.19 × 66,820.98
  4. Step 4: Simplify right side
    100,766.37x = 9,295,813,328.69
  5. Step 5: Solve for x
    x = 9,295,813,328.69/100,766.37
  6. Step 6: Final answer
    x = 92,251.15

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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.