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Finding the Fourth Proportional to 72,841.70, 100,521.45 and 41,020.85

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Solution

The fourth proportional to 72,841.70, 100,521.45 and 41,020.85 is: 56,608.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,841.70 : 100,521.45 = 41,020.85 : x
  2. Step 2: Convert to fraction form
    72,841.70/100,521.45 = 41,020.85/x
  3. Step 3: Cross multiply
    72,841.70x = 100,521.45 × 41,020.85
  4. Step 4: Simplify right side
    72,841.70x = 4,123,474,819.63
  5. Step 5: Solve for x
    x = 4,123,474,819.63/72,841.70
  6. Step 6: Final answer
    x = 56,608.72

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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.