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Finding the Fourth Proportional to 171,883.80, 257,825.70 and 72,017.28

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Solution

The fourth proportional to 171,883.80, 257,825.70 and 72,017.28 is: 108,025.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,883.80 : 257,825.70 = 72,017.28 : x
  2. Step 2: Convert to fraction form
    171,883.80/257,825.70 = 72,017.28/x
  3. Step 3: Cross multiply
    171,883.80x = 257,825.70 × 72,017.28
  4. Step 4: Simplify right side
    171,883.80x = 18,567,905,628.10
  5. Step 5: Solve for x
    x = 18,567,905,628.10/171,883.80
  6. Step 6: Final answer
    x = 108,025.92

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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.