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Finding the Fourth Proportional to 72,384.20, 108,537.90 and 25,638.60

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Solution

The fourth proportional to 72,384.20, 108,537.90 and 25,638.60 is: 38,444.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,384.20 : 108,537.90 = 25,638.60 : x
  2. Step 2: Convert to fraction form
    72,384.20/108,537.90 = 25,638.60/x
  3. Step 3: Cross multiply
    72,384.20x = 108,537.90 × 25,638.60
  4. Step 4: Simplify right side
    72,384.20x = 2,782,759,802.94
  5. Step 5: Solve for x
    x = 2,782,759,802.94/72,384.20
  6. Step 6: Final answer
    x = 38,444.30

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