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Finding the Fourth Proportional to 99,940.40, 149,968.20 and 37,655.60

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Solution

The fourth proportional to 99,940.40, 149,968.20 and 37,655.60 is: 56,505.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,940.40 : 149,968.20 = 37,655.60 : x
  2. Step 2: Convert to fraction form
    99,940.40/149,968.20 = 37,655.60/x
  3. Step 3: Cross multiply
    99,940.40x = 149,968.20 × 37,655.60
  4. Step 4: Simplify right side
    99,940.40x = 5,647,142,551.92
  5. Step 5: Solve for x
    x = 5,647,142,551.92/99,940.40
  6. Step 6: Final answer
    x = 56,505.10

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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.