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Finding the Fourth Proportional to 208,205.69, 287,323.79 and 112,712.31

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Solution

The fourth proportional to 208,205.69, 287,323.79 and 112,712.31 is: 155,542.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,205.69 : 287,323.79 = 112,712.31 : x
  2. Step 2: Convert to fraction form
    208,205.69/287,323.79 = 112,712.31/x
  3. Step 3: Cross multiply
    208,205.69x = 287,323.79 × 112,712.31
  4. Step 4: Simplify right side
    208,205.69x = 32,384,927,525.29
  5. Step 5: Solve for x
    x = 32,384,927,525.29/208,205.69
  6. Step 6: Final answer
    x = 155,542.96

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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.