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Finding the Fourth Proportional to 72,396.80, 108,595.20 and 69,977.60

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Solution

The fourth proportional to 72,396.80, 108,595.20 and 69,977.60 is: 104,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,396.80 : 108,595.20 = 69,977.60 : x
  2. Step 2: Convert to fraction form
    72,396.80/108,595.20 = 69,977.60/x
  3. Step 3: Cross multiply
    72,396.80x = 108,595.20 × 69,977.60
  4. Step 4: Simplify right side
    72,396.80x = 7,599,231,467.52
  5. Step 5: Solve for x
    x = 7,599,231,467.52/72,396.80
  6. Step 6: Final answer
    x = 104,966.40

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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.