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Finding the Fourth Proportional to 79,199.43, 118,787.99 and 20,031.45

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Solution

The fourth proportional to 79,199.43, 118,787.99 and 20,031.45 is: 30,044.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,199.43 : 118,787.99 = 20,031.45 : x
  2. Step 2: Convert to fraction form
    79,199.43/118,787.99 = 20,031.45/x
  3. Step 3: Cross multiply
    79,199.43x = 118,787.99 × 20,031.45
  4. Step 4: Simplify right side
    79,199.43x = 2,379,495,582.13
  5. Step 5: Solve for x
    x = 2,379,495,582.13/79,199.43
  6. Step 6: Final answer
    x = 30,044.35

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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.