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Finding the Fourth Proportional to 172,704.90, 259,092.29 and 72,865.32

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Solution

The fourth proportional to 172,704.90, 259,092.29 and 72,865.32 is: 109,312.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,704.90 : 259,092.29 = 72,865.32 : x
  2. Step 2: Convert to fraction form
    172,704.90/259,092.29 = 72,865.32/x
  3. Step 3: Cross multiply
    172,704.90x = 259,092.29 × 72,865.32
  4. Step 4: Simplify right side
    172,704.90x = 18,878,842,256.06
  5. Step 5: Solve for x
    x = 18,878,842,256.06/172,704.90
  6. Step 6: Final answer
    x = 109,312.72

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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.