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Finding the Fourth Proportional to 129,751.80, 194,627.70 and 70,702.80

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Solution

The fourth proportional to 129,751.80, 194,627.70 and 70,702.80 is: 106,054.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,751.80 : 194,627.70 = 70,702.80 : x
  2. Step 2: Convert to fraction form
    129,751.80/194,627.70 = 70,702.80/x
  3. Step 3: Cross multiply
    129,751.80x = 194,627.70 × 70,702.80
  4. Step 4: Simplify right side
    129,751.80x = 13,760,723,347.56
  5. Step 5: Solve for x
    x = 13,760,723,347.56/129,751.80
  6. Step 6: Final answer
    x = 106,054.20

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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.