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Finding the Fourth Proportional to 76,615.20, 114,955.20 and 48,556.80

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Solution

The fourth proportional to 76,615.20, 114,955.20 and 48,556.80 is: 72,855.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,615.20 : 114,955.20 = 48,556.80 : x
  2. Step 2: Convert to fraction form
    76,615.20/114,955.20 = 48,556.80/x
  3. Step 3: Cross multiply
    76,615.20x = 114,955.20 × 48,556.80
  4. Step 4: Simplify right side
    76,615.20x = 5,581,856,655.36
  5. Step 5: Solve for x
    x = 5,581,856,655.36/76,615.20
  6. Step 6: Final answer
    x = 72,855.73

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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.