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Finding the Fourth Proportional to 73,813.60, 110,720.40 and 71,869.60

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Solution

The fourth proportional to 73,813.60, 110,720.40 and 71,869.60 is: 107,804.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,813.60 : 110,720.40 = 71,869.60 : x
  2. Step 2: Convert to fraction form
    73,813.60/110,720.40 = 71,869.60/x
  3. Step 3: Cross multiply
    73,813.60x = 110,720.40 × 71,869.60
  4. Step 4: Simplify right side
    73,813.60x = 7,957,430,859.84
  5. Step 5: Solve for x
    x = 7,957,430,859.84/73,813.60
  6. Step 6: Final answer
    x = 107,804.40

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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.