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Finding the Fourth Proportional to 191,676.88, 287,398.20 and 91,867.60

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Solution

The fourth proportional to 191,676.88, 287,398.20 and 91,867.60 is: 137,745.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,676.88 : 287,398.20 = 91,867.60 : x
  2. Step 2: Convert to fraction form
    191,676.88/287,398.20 = 91,867.60/x
  3. Step 3: Cross multiply
    191,676.88x = 287,398.20 × 91,867.60
  4. Step 4: Simplify right side
    191,676.88x = 26,402,582,878.32
  5. Step 5: Solve for x
    x = 26,402,582,878.32/191,676.88
  6. Step 6: Final answer
    x = 137,745.27

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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.