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Finding the Fourth Proportional to 72,355.60, 108,564.64 and 39,069.04

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Solution

The fourth proportional to 72,355.60, 108,564.64 and 39,069.04 is: 58,620.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,355.60 : 108,564.64 = 39,069.04 : x
  2. Step 2: Convert to fraction form
    72,355.60/108,564.64 = 39,069.04/x
  3. Step 3: Cross multiply
    72,355.60x = 108,564.64 × 39,069.04
  4. Step 4: Simplify right side
    72,355.60x = 4,241,516,262.75
  5. Step 5: Solve for x
    x = 4,241,516,262.75/72,355.60
  6. Step 6: Final answer
    x = 58,620.43

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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.