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Finding the Fourth Proportional to 191,361.72, 287,107.15 and 84,731.12

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Solution

The fourth proportional to 191,361.72, 287,107.15 and 84,731.12 is: 127,125.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,361.72 : 287,107.15 = 84,731.12 : x
  2. Step 2: Convert to fraction form
    191,361.72/287,107.15 = 84,731.12/x
  3. Step 3: Cross multiply
    191,361.72x = 287,107.15 × 84,731.12
  4. Step 4: Simplify right side
    191,361.72x = 24,326,910,379.51
  5. Step 5: Solve for x
    x = 24,326,910,379.51/191,361.72
  6. Step 6: Final answer
    x = 127,125.27

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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.