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Finding the Fourth Proportional to 67,216.23, 100,830.42 and 19,831.23

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Solution

The fourth proportional to 67,216.23, 100,830.42 and 19,831.23 is: 29,748.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,216.23 : 100,830.42 = 19,831.23 : x
  2. Step 2: Convert to fraction form
    67,216.23/100,830.42 = 19,831.23/x
  3. Step 3: Cross multiply
    67,216.23x = 100,830.42 × 19,831.23
  4. Step 4: Simplify right side
    67,216.23x = 1,999,591,250.02
  5. Step 5: Solve for x
    x = 1,999,591,250.02/67,216.23
  6. Step 6: Final answer
    x = 29,748.64

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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.