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Finding the Fourth Proportional to 100,825.52, 139,147.80 and 55,512.32

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Solution

The fourth proportional to 100,825.52, 139,147.80 and 55,512.32 is: 76,611.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,825.52 : 139,147.80 = 55,512.32 : x
  2. Step 2: Convert to fraction form
    100,825.52/139,147.80 = 55,512.32/x
  3. Step 3: Cross multiply
    100,825.52x = 139,147.80 × 55,512.32
  4. Step 4: Simplify right side
    100,825.52x = 7,724,417,200.90
  5. Step 5: Solve for x
    x = 7,724,417,200.90/100,825.52
  6. Step 6: Final answer
    x = 76,611.73

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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.