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Finding the Fourth Proportional to 172,507.60, 258,556.60 and 72,667.60

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Solution

The fourth proportional to 172,507.60, 258,556.60 and 72,667.60 is: 108,915.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,507.60 : 258,556.60 = 72,667.60 : x
  2. Step 2: Convert to fraction form
    172,507.60/258,556.60 = 72,667.60/x
  3. Step 3: Cross multiply
    172,507.60x = 258,556.60 × 72,667.60
  4. Step 4: Simplify right side
    172,507.60x = 18,788,687,586.16
  5. Step 5: Solve for x
    x = 18,788,687,586.16/172,507.60
  6. Step 6: Final answer
    x = 108,915.13

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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.