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Finding the Fourth Proportional to 208,486.31, 287,711.01 and 112,992.98

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Solution

The fourth proportional to 208,486.31, 287,711.01 and 112,992.98 is: 155,930.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,486.31 : 287,711.01 = 112,992.98 : x
  2. Step 2: Convert to fraction form
    208,486.31/287,711.01 = 112,992.98/x
  3. Step 3: Cross multiply
    208,486.31x = 287,711.01 × 112,992.98
  4. Step 4: Simplify right side
    208,486.31x = 32,509,322,960.15
  5. Step 5: Solve for x
    x = 32,509,322,960.15/208,486.31
  6. Step 6: Final answer
    x = 155,930.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.