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Finding the Fourth Proportional to 125,888.78, 173,721.31 and 72,170.60

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Solution

The fourth proportional to 125,888.78, 173,721.31 and 72,170.60 is: 99,592.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,888.78 : 173,721.31 = 72,170.60 : x
  2. Step 2: Convert to fraction form
    125,888.78/173,721.31 = 72,170.60/x
  3. Step 3: Cross multiply
    125,888.78x = 173,721.31 × 72,170.60
  4. Step 4: Simplify right side
    125,888.78x = 12,537,570,126.45
  5. Step 5: Solve for x
    x = 12,537,570,126.45/125,888.78
  6. Step 6: Final answer
    x = 99,592.43

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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.