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Finding the Fourth Proportional to 79,802.37, 119,720.88 and 39,842.85

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Solution

The fourth proportional to 79,802.37, 119,720.88 and 39,842.85 is: 59,772.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,802.37 : 119,720.88 = 39,842.85 : x
  2. Step 2: Convert to fraction form
    79,802.37/119,720.88 = 39,842.85/x
  3. Step 3: Cross multiply
    79,802.37x = 119,720.88 × 39,842.85
  4. Step 4: Simplify right side
    79,802.37x = 4,770,021,063.71
  5. Step 5: Solve for x
    x = 4,770,021,063.71/79,802.37
  6. Step 6: Final answer
    x = 59,772.92

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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.