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Finding the Fourth Proportional to 72,491.30, 108,736.74 and 19,900.83

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Solution

The fourth proportional to 72,491.30, 108,736.74 and 19,900.83 is: 29,851.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,491.30 : 108,736.74 = 19,900.83 : x
  2. Step 2: Convert to fraction form
    72,491.30/108,736.74 = 19,900.83/x
  3. Step 3: Cross multiply
    72,491.30x = 108,736.74 × 19,900.83
  4. Step 4: Simplify right side
    72,491.30x = 2,163,951,377.49
  5. Step 5: Solve for x
    x = 2,163,951,377.49/72,491.30
  6. Step 6: Final answer
    x = 29,851.19

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1.5x scale

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.