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Finding the Fourth Proportional to 61,940.76, 92,910.66 and 20,387.64

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Solution

The fourth proportional to 61,940.76, 92,910.66 and 20,387.64 is: 30,581.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,940.76 : 92,910.66 = 20,387.64 : x
  2. Step 2: Convert to fraction form
    61,940.76/92,910.66 = 20,387.64/x
  3. Step 3: Cross multiply
    61,940.76x = 92,910.66 × 20,387.64
  4. Step 4: Simplify right side
    61,940.76x = 1,894,229,088.24
  5. Step 5: Solve for x
    x = 1,894,229,088.24/61,940.76
  6. Step 6: Final answer
    x = 30,581.30

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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.