Home / 76,421.20-114,631.80-68,645.20

Finding the Fourth Proportional to 76,421.20, 114,631.80 and 68,645.20

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Solution

The fourth proportional to 76,421.20, 114,631.80 and 68,645.20 is: 102,967.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,421.20 : 114,631.80 = 68,645.20 : x
  2. Step 2: Convert to fraction form
    76,421.20/114,631.80 = 68,645.20/x
  3. Step 3: Cross multiply
    76,421.20x = 114,631.80 × 68,645.20
  4. Step 4: Simplify right side
    76,421.20x = 7,868,922,837.36
  5. Step 5: Solve for x
    x = 7,868,922,837.36/76,421.20
  6. Step 6: Final answer
    x = 102,967.80

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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.