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Finding the Fourth Proportional to 125,487.84, 173,176.22 and 68,129.57

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Solution

The fourth proportional to 125,487.84, 173,176.22 and 68,129.57 is: 94,020.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,487.84 : 173,176.22 = 68,129.57 : x
  2. Step 2: Convert to fraction form
    125,487.84/173,176.22 = 68,129.57/x
  3. Step 3: Cross multiply
    125,487.84x = 173,176.22 × 68,129.57
  4. Step 4: Simplify right side
    125,487.84x = 11,798,422,006.09
  5. Step 5: Solve for x
    x = 11,798,422,006.09/125,487.84
  6. Step 6: Final answer
    x = 94,020.44

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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.