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Finding the Fourth Proportional to 78,787.98, 118,203.03 and 34,418.34

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Solution

The fourth proportional to 78,787.98, 118,203.03 and 34,418.34 is: 51,636.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,787.98 : 118,203.03 = 34,418.34 : x
  2. Step 2: Convert to fraction form
    78,787.98/118,203.03 = 34,418.34/x
  3. Step 3: Cross multiply
    78,787.98x = 118,203.03 × 34,418.34
  4. Step 4: Simplify right side
    78,787.98x = 4,068,352,075.57
  5. Step 5: Solve for x
    x = 4,068,352,075.57/78,787.98
  6. Step 6: Final answer
    x = 51,636.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.