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Finding the Fourth Proportional to 129,901.60, 194,917.20 and 73,784.80

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Solution

The fourth proportional to 129,901.60, 194,917.20 and 73,784.80 is: 110,714.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,901.60 : 194,917.20 = 73,784.80 : x
  2. Step 2: Convert to fraction form
    129,901.60/194,917.20 = 73,784.80/x
  3. Step 3: Cross multiply
    129,901.60x = 194,917.20 × 73,784.80
  4. Step 4: Simplify right side
    129,901.60x = 14,381,926,618.56
  5. Step 5: Solve for x
    x = 14,381,926,618.56/129,901.60
  6. Step 6: Final answer
    x = 110,714.01

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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.