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Finding the Fourth Proportional to 72,355.20, 108,532.80 and 48,735.60

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Solution

The fourth proportional to 72,355.20, 108,532.80 and 48,735.60 is: 73,103.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,355.20 : 108,532.80 = 48,735.60 : x
  2. Step 2: Convert to fraction form
    72,355.20/108,532.80 = 48,735.60/x
  3. Step 3: Cross multiply
    72,355.20x = 108,532.80 × 48,735.60
  4. Step 4: Simplify right side
    72,355.20x = 5,289,411,127.68
  5. Step 5: Solve for x
    x = 5,289,411,127.68/72,355.20
  6. Step 6: Final answer
    x = 73,103.40

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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.