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Finding the Fourth Proportional to 172,009.44, 257,751.05 and 72,115.11

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Solution

The fourth proportional to 172,009.44, 257,751.05 and 72,115.11 is: 108,062.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,009.44 : 257,751.05 = 72,115.11 : x
  2. Step 2: Convert to fraction form
    172,009.44/257,751.05 = 72,115.11/x
  3. Step 3: Cross multiply
    172,009.44x = 257,751.05 × 72,115.11
  4. Step 4: Simplify right side
    172,009.44x = 18,587,744,962.79
  5. Step 5: Solve for x
    x = 18,587,744,962.79/172,009.44
  6. Step 6: Final answer
    x = 108,062.35

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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.