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Finding the Fourth Proportional to 69,606.40, 104,409.60 and 40,115.20

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Solution

The fourth proportional to 69,606.40, 104,409.60 and 40,115.20 is: 60,172.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,606.40 : 104,409.60 = 40,115.20 : x
  2. Step 2: Convert to fraction form
    69,606.40/104,409.60 = 40,115.20/x
  3. Step 3: Cross multiply
    69,606.40x = 104,409.60 × 40,115.20
  4. Step 4: Simplify right side
    69,606.40x = 4,188,411,985.92
  5. Step 5: Solve for x
    x = 4,188,411,985.92/69,606.40
  6. Step 6: Final answer
    x = 60,172.80

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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.