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Finding the Fourth Proportional to 118,809.90, 163,942.11 and 71,045.82

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Solution

The fourth proportional to 118,809.90, 163,942.11 and 71,045.82 is: 98,033.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,809.90 : 163,942.11 = 71,045.82 : x
  2. Step 2: Convert to fraction form
    118,809.90/163,942.11 = 71,045.82/x
  3. Step 3: Cross multiply
    118,809.90x = 163,942.11 × 71,045.82
  4. Step 4: Simplify right side
    118,809.90x = 11,647,401,637.48
  5. Step 5: Solve for x
    x = 11,647,401,637.48/118,809.90
  6. Step 6: Final answer
    x = 98,033.93

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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.