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Finding the Fourth Proportional to 129,702.40, 194,246.40 and 87,923.20

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Solution

The fourth proportional to 129,702.40, 194,246.40 and 87,923.20 is: 131,676.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,702.40 : 194,246.40 = 87,923.20 : x
  2. Step 2: Convert to fraction form
    129,702.40/194,246.40 = 87,923.20/x
  3. Step 3: Cross multiply
    129,702.40x = 194,246.40 × 87,923.20
  4. Step 4: Simplify right side
    129,702.40x = 17,078,765,076.48
  5. Step 5: Solve for x
    x = 17,078,765,076.48/129,702.40
  6. Step 6: Final answer
    x = 131,676.55

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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.