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Finding the Fourth Proportional to 100,865.20, 151,281.60 and 30,728.20

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Solution

The fourth proportional to 100,865.20, 151,281.60 and 30,728.20 is: 46,087.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,865.20 : 151,281.60 = 30,728.20 : x
  2. Step 2: Convert to fraction form
    100,865.20/151,281.60 = 30,728.20/x
  3. Step 3: Cross multiply
    100,865.20x = 151,281.60 × 30,728.20
  4. Step 4: Simplify right side
    100,865.20x = 4,648,611,261.12
  5. Step 5: Solve for x
    x = 4,648,611,261.12/100,865.20
  6. Step 6: Final answer
    x = 46,087.36

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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.