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Finding the Fourth Proportional to 129,627.36, 194,300.60 and 66,360.72

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Solution

The fourth proportional to 129,627.36, 194,300.60 and 66,360.72 is: 99,469.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,627.36 : 194,300.60 = 66,360.72 : x
  2. Step 2: Convert to fraction form
    129,627.36/194,300.60 = 66,360.72/x
  3. Step 3: Cross multiply
    129,627.36x = 194,300.60 × 66,360.72
  4. Step 4: Simplify right side
    129,627.36x = 12,893,927,202.95
  5. Step 5: Solve for x
    x = 12,893,927,202.95/129,627.36
  6. Step 6: Final answer
    x = 99,469.18

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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.