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Finding the Fourth Proportional to 208,562.01, 287,662.70 and 136,915.89

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Solution

The fourth proportional to 208,562.01, 287,662.70 and 136,915.89 is: 188,843.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,562.01 : 287,662.70 = 136,915.89 : x
  2. Step 2: Convert to fraction form
    208,562.01/287,662.70 = 136,915.89/x
  3. Step 3: Cross multiply
    208,562.01x = 287,662.70 × 136,915.89
  4. Step 4: Simplify right side
    208,562.01x = 39,385,593,905.72
  5. Step 5: Solve for x
    x = 39,385,593,905.72/208,562.01
  6. Step 6: Final answer
    x = 188,843.57

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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.