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Finding the Fourth Proportional to 72,992.87, 100,712.93 and 44,311.80

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Solution

The fourth proportional to 72,992.87, 100,712.93 and 44,311.80 is: 61,139.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,992.87 : 100,712.93 = 44,311.80 : x
  2. Step 2: Convert to fraction form
    72,992.87/100,712.93 = 44,311.80/x
  3. Step 3: Cross multiply
    72,992.87x = 100,712.93 × 44,311.80
  4. Step 4: Simplify right side
    72,992.87x = 4,462,771,211.57
  5. Step 5: Solve for x
    x = 4,462,771,211.57/72,992.87
  6. Step 6: Final answer
    x = 61,139.82

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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.