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Finding the Fourth Proportional to 171,807.80, 257,711.70 and 72,080.60

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Solution

The fourth proportional to 171,807.80, 257,711.70 and 72,080.60 is: 108,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,807.80 : 257,711.70 = 72,080.60 : x
  2. Step 2: Convert to fraction form
    171,807.80/257,711.70 = 72,080.60/x
  3. Step 3: Cross multiply
    171,807.80x = 257,711.70 × 72,080.60
  4. Step 4: Simplify right side
    171,807.80x = 18,576,013,963.02
  5. Step 5: Solve for x
    x = 18,576,013,963.02/171,807.80
  6. Step 6: Final answer
    x = 108,120.90

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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.