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Finding the Fourth Proportional to 67,036.48, 100,485.60 and 30,126.40

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Solution

The fourth proportional to 67,036.48, 100,485.60 and 30,126.40 is: 45,158.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,036.48 : 100,485.60 = 30,126.40 : x
  2. Step 2: Convert to fraction form
    67,036.48/100,485.60 = 30,126.40/x
  3. Step 3: Cross multiply
    67,036.48x = 100,485.60 × 30,126.40
  4. Step 4: Simplify right side
    67,036.48x = 3,027,269,379.84
  5. Step 5: Solve for x
    x = 3,027,269,379.84/67,036.48
  6. Step 6: Final answer
    x = 45,158.54

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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.