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Finding the Fourth Proportional to 79,321.65, 118,929.22 and 31,246.30

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Solution

The fourth proportional to 79,321.65, 118,929.22 and 31,246.30 is: 46,848.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,321.65 : 118,929.22 = 31,246.30 : x
  2. Step 2: Convert to fraction form
    79,321.65/118,929.22 = 31,246.30/x
  3. Step 3: Cross multiply
    79,321.65x = 118,929.22 × 31,246.30
  4. Step 4: Simplify right side
    79,321.65x = 3,716,098,086.89
  5. Step 5: Solve for x
    x = 3,716,098,086.89/79,321.65
  6. Step 6: Final answer
    x = 46,848.47

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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.