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Finding the Fourth Proportional to 124,556.40, 186,721.20 and 45,651.60

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Solution

The fourth proportional to 124,556.40, 186,721.20 and 45,651.60 is: 68,435.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,556.40 : 186,721.20 = 45,651.60 : x
  2. Step 2: Convert to fraction form
    124,556.40/186,721.20 = 45,651.60/x
  3. Step 3: Cross multiply
    124,556.40x = 186,721.20 × 45,651.60
  4. Step 4: Simplify right side
    124,556.40x = 8,524,121,533.92
  5. Step 5: Solve for x
    x = 8,524,121,533.92/124,556.40
  6. Step 6: Final answer
    x = 68,435.84

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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.