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Finding the Fourth Proportional to 125,124.78, 172,674.72 and 68,536.20

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Solution

The fourth proportional to 125,124.78, 172,674.72 and 68,536.20 is: 94,581.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,124.78 : 172,674.72 = 68,536.20 : x
  2. Step 2: Convert to fraction form
    125,124.78/172,674.72 = 68,536.20/x
  3. Step 3: Cross multiply
    125,124.78x = 172,674.72 × 68,536.20
  4. Step 4: Simplify right side
    125,124.78x = 11,834,469,144.86
  5. Step 5: Solve for x
    x = 11,834,469,144.86/125,124.78
  6. Step 6: Final answer
    x = 94,581.34

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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.