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Finding the Fourth Proportional to 180,490.41, 270,729.54 and 85,788.72

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Solution

The fourth proportional to 180,490.41, 270,729.54 and 85,788.72 is: 128,680.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,490.41 : 270,729.54 = 85,788.72 : x
  2. Step 2: Convert to fraction form
    180,490.41/270,729.54 = 85,788.72/x
  3. Step 3: Cross multiply
    180,490.41x = 270,729.54 × 85,788.72
  4. Step 4: Simplify right side
    180,490.41x = 23,225,540,702.79
  5. Step 5: Solve for x
    x = 23,225,540,702.79/180,490.41
  6. Step 6: Final answer
    x = 128,680.19

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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.