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Finding the Fourth Proportional to 129,641.54, 178,898.90 and 73,056.56

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Solution

The fourth proportional to 129,641.54, 178,898.90 and 73,056.56 is: 100,814.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,641.54 : 178,898.90 = 73,056.56 : x
  2. Step 2: Convert to fraction form
    129,641.54/178,898.90 = 73,056.56/x
  3. Step 3: Cross multiply
    129,641.54x = 178,898.90 × 73,056.56
  4. Step 4: Simplify right side
    129,641.54x = 13,069,738,221.78
  5. Step 5: Solve for x
    x = 13,069,738,221.78/129,641.54
  6. Step 6: Final answer
    x = 100,814.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.