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Finding the Fourth Proportional to 79,892.20, 119,915.10 and 40,493.80

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Solution

The fourth proportional to 79,892.20, 119,915.10 and 40,493.80 is: 60,779.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,892.20 : 119,915.10 = 40,493.80 : x
  2. Step 2: Convert to fraction form
    79,892.20/119,915.10 = 40,493.80/x
  3. Step 3: Cross multiply
    79,892.20x = 119,915.10 × 40,493.80
  4. Step 4: Simplify right side
    79,892.20x = 4,855,818,076.38
  5. Step 5: Solve for x
    x = 4,855,818,076.38/79,892.20
  6. Step 6: Final answer
    x = 60,779.63

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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.