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Finding the Fourth Proportional to 79,294.41, 118,989.63 and 31,920.03

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Solution

The fourth proportional to 79,294.41, 118,989.63 and 31,920.03 is: 47,899.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,294.41 : 118,989.63 = 31,920.03 : x
  2. Step 2: Convert to fraction form
    79,294.41/118,989.63 = 31,920.03/x
  3. Step 3: Cross multiply
    79,294.41x = 118,989.63 × 31,920.03
  4. Step 4: Simplify right side
    79,294.41x = 3,798,152,559.29
  5. Step 5: Solve for x
    x = 3,798,152,559.29/79,294.41
  6. Step 6: Final answer
    x = 47,899.37

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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.