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Finding the Fourth Proportional to 79,782.80, 119,645.40 and 40,326.80

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Solution

The fourth proportional to 79,782.80, 119,645.40 and 40,326.80 is: 60,475.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,782.80 : 119,645.40 = 40,326.80 : x
  2. Step 2: Convert to fraction form
    79,782.80/119,645.40 = 40,326.80/x
  3. Step 3: Cross multiply
    79,782.80x = 119,645.40 × 40,326.80
  4. Step 4: Simplify right side
    79,782.80x = 4,824,916,116.72
  5. Step 5: Solve for x
    x = 4,824,916,116.72/79,782.80
  6. Step 6: Final answer
    x = 60,475.64

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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.