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Finding the Fourth Proportional to 125,106.54, 172,640.60 and 68,506.98

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Solution

The fourth proportional to 125,106.54, 172,640.60 and 68,506.98 is: 94,536.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,106.54 : 172,640.60 = 68,506.98 : x
  2. Step 2: Convert to fraction form
    125,106.54/172,640.60 = 68,506.98/x
  3. Step 3: Cross multiply
    125,106.54x = 172,640.60 × 68,506.98
  4. Step 4: Simplify right side
    125,106.54x = 11,827,086,131.39
  5. Step 5: Solve for x
    x = 11,827,086,131.39/125,106.54
  6. Step 6: Final answer
    x = 94,536.11

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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.