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Finding the Fourth Proportional to 208,204.69, 287,322.41 and 112,711.31

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Solution

The fourth proportional to 208,204.69, 287,322.41 and 112,711.31 is: 155,541.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,204.69 : 287,322.41 = 112,711.31 : x
  2. Step 2: Convert to fraction form
    208,204.69/287,322.41 = 112,711.31/x
  3. Step 3: Cross multiply
    208,204.69x = 287,322.41 × 112,711.31
  4. Step 4: Simplify right side
    208,204.69x = 32,384,484,659.90
  5. Step 5: Solve for x
    x = 32,384,484,659.90/208,204.69
  6. Step 6: Final answer
    x = 155,541.58

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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.