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Finding the Fourth Proportional to 124,512.40, 186,768.60 and 86,458.60

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Solution

The fourth proportional to 124,512.40, 186,768.60 and 86,458.60 is: 129,687.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,512.40 : 186,768.60 = 86,458.60 : x
  2. Step 2: Convert to fraction form
    124,512.40/186,768.60 = 86,458.60/x
  3. Step 3: Cross multiply
    124,512.40x = 186,768.60 × 86,458.60
  4. Step 4: Simplify right side
    124,512.40x = 16,147,751,679.96
  5. Step 5: Solve for x
    x = 16,147,751,679.96/124,512.40
  6. Step 6: Final answer
    x = 129,687.90

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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.