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Finding the Fourth Proportional to 79,406.88, 119,108.64 and 20,242.56

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Solution

The fourth proportional to 79,406.88, 119,108.64 and 20,242.56 is: 30,363.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,406.88 : 119,108.64 = 20,242.56 : x
  2. Step 2: Convert to fraction form
    79,406.88/119,108.64 = 20,242.56/x
  3. Step 3: Cross multiply
    79,406.88x = 119,108.64 × 20,242.56
  4. Step 4: Simplify right side
    79,406.88x = 2,411,063,791.72
  5. Step 5: Solve for x
    x = 2,411,063,791.72/79,406.88
  6. Step 6: Final answer
    x = 30,363.41

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1.5x scale

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.