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Finding the Fourth Proportional to 191,540.40, 287,310.60 and 49,385.40

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Solution

The fourth proportional to 191,540.40, 287,310.60 and 49,385.40 is: 74,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,540.40 : 287,310.60 = 49,385.40 : x
  2. Step 2: Convert to fraction form
    191,540.40/287,310.60 = 49,385.40/x
  3. Step 3: Cross multiply
    191,540.40x = 287,310.60 × 49,385.40
  4. Step 4: Simplify right side
    191,540.40x = 14,188,948,905.24
  5. Step 5: Solve for x
    x = 14,188,948,905.24/191,540.40
  6. Step 6: Final answer
    x = 74,078.10

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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.