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Finding the Fourth Proportional to 172,343.90, 258,458.45 and 72,485.48

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Solution

The fourth proportional to 172,343.90, 258,458.45 and 72,485.48 is: 108,704.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,343.90 : 258,458.45 = 72,485.48 : x
  2. Step 2: Convert to fraction form
    172,343.90/258,458.45 = 72,485.48/x
  3. Step 3: Cross multiply
    172,343.90x = 258,458.45 × 72,485.48
  4. Step 4: Simplify right side
    172,343.90x = 18,734,485,092.02
  5. Step 5: Solve for x
    x = 18,734,485,092.02/172,343.90
  6. Step 6: Final answer
    x = 108,704.08

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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.