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Finding the Fourth Proportional to 208,121.34, 287,207.43 and 112,628.04

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Solution

The fourth proportional to 208,121.34, 287,207.43 and 112,628.04 is: 155,426.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,121.34 : 287,207.43 = 112,628.04 : x
  2. Step 2: Convert to fraction form
    208,121.34/287,207.43 = 112,628.04/x
  3. Step 3: Cross multiply
    208,121.34x = 287,207.43 × 112,628.04
  4. Step 4: Simplify right side
    208,121.34x = 32,347,609,914.34
  5. Step 5: Solve for x
    x = 32,347,609,914.34/208,121.34
  6. Step 6: Final answer
    x = 155,426.68

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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.