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Finding the Fourth Proportional to 88,428.80, 132,448.80 and 76,764.80

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Solution

The fourth proportional to 88,428.80, 132,448.80 and 76,764.80 is: 114,978.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,428.80 : 132,448.80 = 76,764.80 : x
  2. Step 2: Convert to fraction form
    88,428.80/132,448.80 = 76,764.80/x
  3. Step 3: Cross multiply
    88,428.80x = 132,448.80 × 76,764.80
  4. Step 4: Simplify right side
    88,428.80x = 10,167,405,642.24
  5. Step 5: Solve for x
    x = 10,167,405,642.24/88,428.80
  6. Step 6: Final answer
    x = 114,978.44

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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.