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Finding the Fourth Proportional to 129,931.80, 194,751.90 and 73,798.80

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Solution

The fourth proportional to 129,931.80, 194,751.90 and 73,798.80 is: 110,615.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,931.80 : 194,751.90 = 73,798.80 : x
  2. Step 2: Convert to fraction form
    129,931.80/194,751.90 = 73,798.80/x
  3. Step 3: Cross multiply
    129,931.80x = 194,751.90 × 73,798.80
  4. Step 4: Simplify right side
    129,931.80x = 14,372,456,517.72
  5. Step 5: Solve for x
    x = 14,372,456,517.72/129,931.80
  6. Step 6: Final answer
    x = 110,615.39

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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.