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Finding the Fourth Proportional to 172,421.55, 258,669.55 and 52,487.88

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Solution

The fourth proportional to 172,421.55, 258,669.55 and 52,487.88 is: 78,743.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,421.55 : 258,669.55 = 52,487.88 : x
  2. Step 2: Convert to fraction form
    172,421.55/258,669.55 = 52,487.88/x
  3. Step 3: Cross multiply
    172,421.55x = 258,669.55 × 52,487.88
  4. Step 4: Simplify right side
    172,421.55x = 13,577,016,300.05
  5. Step 5: Solve for x
    x = 13,577,016,300.05/172,421.55
  6. Step 6: Final answer
    x = 78,743.15

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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.