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Finding the Fourth Proportional to 72,628.40, 108,948.88 and 20,037.89

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Solution

The fourth proportional to 72,628.40, 108,948.88 and 20,037.89 is: 30,058.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,628.40 : 108,948.88 = 20,037.89 : x
  2. Step 2: Convert to fraction form
    72,628.40/108,948.88 = 20,037.89/x
  3. Step 3: Cross multiply
    72,628.40x = 108,948.88 × 20,037.89
  4. Step 4: Simplify right side
    72,628.40x = 2,183,105,028.13
  5. Step 5: Solve for x
    x = 2,183,105,028.13/72,628.40
  6. Step 6: Final answer
    x = 30,058.56

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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.