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Finding the Fourth Proportional to 72,992.30, 109,315.65 and 44,998.70

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Solution

The fourth proportional to 72,992.30, 109,315.65 and 44,998.70 is: 67,391.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,992.30 : 109,315.65 = 44,998.70 : x
  2. Step 2: Convert to fraction form
    72,992.30/109,315.65 = 44,998.70/x
  3. Step 3: Cross multiply
    72,992.30x = 109,315.65 × 44,998.70
  4. Step 4: Simplify right side
    72,992.30x = 4,919,062,139.66
  5. Step 5: Solve for x
    x = 4,919,062,139.66/72,992.30
  6. Step 6: Final answer
    x = 67,391.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.