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Finding the Fourth Proportional to 125,105.76, 172,648.80 and 68,516.64

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Solution

The fourth proportional to 125,105.76, 172,648.80 and 68,516.64 is: 94,554.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,105.76 : 172,648.80 = 68,516.64 : x
  2. Step 2: Convert to fraction form
    125,105.76/172,648.80 = 68,516.64/x
  3. Step 3: Cross multiply
    125,105.76x = 172,648.80 × 68,516.64
  4. Step 4: Simplify right side
    125,105.76x = 11,829,315,676.03
  5. Step 5: Solve for x
    x = 11,829,315,676.03/125,105.76
  6. Step 6: Final answer
    x = 94,554.52

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1.5x scale

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.