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Finding the Fourth Proportional to 123,969.60, 186,148.80 and 71,481.60

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Solution

The fourth proportional to 123,969.60, 186,148.80 and 71,481.60 is: 107,334.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,969.60 : 186,148.80 = 71,481.60 : x
  2. Step 2: Convert to fraction form
    123,969.60/186,148.80 = 71,481.60/x
  3. Step 3: Cross multiply
    123,969.60x = 186,148.80 × 71,481.60
  4. Step 4: Simplify right side
    123,969.60x = 13,306,214,062.08
  5. Step 5: Solve for x
    x = 13,306,214,062.08/123,969.60
  6. Step 6: Final answer
    x = 107,334.49

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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.