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Finding the Fourth Proportional to 79,063.56, 118,614.78 and 31,681.80

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Solution

The fourth proportional to 79,063.56, 118,614.78 and 31,681.80 is: 47,530.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,063.56 : 118,614.78 = 31,681.80 : x
  2. Step 2: Convert to fraction form
    79,063.56/118,614.78 = 31,681.80/x
  3. Step 3: Cross multiply
    79,063.56x = 118,614.78 × 31,681.80
  4. Step 4: Simplify right side
    79,063.56x = 3,757,929,737.00
  5. Step 5: Solve for x
    x = 3,757,929,737.00/79,063.56
  6. Step 6: Final answer
    x = 47,530.49

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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.