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Finding the Fourth Proportional to 129,900.60, 194,915.70 and 73,783.80

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Solution

The fourth proportional to 129,900.60, 194,915.70 and 73,783.80 is: 110,712.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,900.60 : 194,915.70 = 73,783.80 : x
  2. Step 2: Convert to fraction form
    129,900.60/194,915.70 = 73,783.80/x
  3. Step 3: Cross multiply
    129,900.60x = 194,915.70 × 73,783.80
  4. Step 4: Simplify right side
    129,900.60x = 14,381,621,025.66
  5. Step 5: Solve for x
    x = 14,381,621,025.66/129,900.60
  6. Step 6: Final answer
    x = 110,712.51

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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.