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Finding the Fourth Proportional to 100,751.40, 151,127.10 and 30,630.60

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Solution

The fourth proportional to 100,751.40, 151,127.10 and 30,630.60 is: 45,945.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,751.40 : 151,127.10 = 30,630.60 : x
  2. Step 2: Convert to fraction form
    100,751.40/151,127.10 = 30,630.60/x
  3. Step 3: Cross multiply
    100,751.40x = 151,127.10 × 30,630.60
  4. Step 4: Simplify right side
    100,751.40x = 4,629,113,749.26
  5. Step 5: Solve for x
    x = 4,629,113,749.26/100,751.40
  6. Step 6: Final answer
    x = 45,945.90

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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.