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Finding the Fourth Proportional to 171,604.40, 257,406.60 and 145,425.20

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Solution

The fourth proportional to 171,604.40, 257,406.60 and 145,425.20 is: 218,137.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,604.40 : 257,406.60 = 145,425.20 : x
  2. Step 2: Convert to fraction form
    171,604.40/257,406.60 = 145,425.20/x
  3. Step 3: Cross multiply
    171,604.40x = 257,406.60 × 145,425.20
  4. Step 4: Simplify right side
    171,604.40x = 37,433,406,286.32
  5. Step 5: Solve for x
    x = 37,433,406,286.32/171,604.40
  6. Step 6: Final answer
    x = 218,137.80

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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.