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Finding the Fourth Proportional to 172,425.72, 258,638.58 and 47,763.48

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Solution

The fourth proportional to 172,425.72, 258,638.58 and 47,763.48 is: 71,645.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,425.72 : 258,638.58 = 47,763.48 : x
  2. Step 2: Convert to fraction form
    172,425.72/258,638.58 = 47,763.48/x
  3. Step 3: Cross multiply
    172,425.72x = 258,638.58 × 47,763.48
  4. Step 4: Simplify right side
    172,425.72x = 12,353,478,643.06
  5. Step 5: Solve for x
    x = 12,353,478,643.06/172,425.72
  6. Step 6: Final answer
    x = 71,645.22

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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.