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Finding the Fourth Proportional to 172,486.64, 258,636.05 and 60,136.66

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Solution

The fourth proportional to 172,486.64, 258,636.05 and 60,136.66 is: 90,172.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,486.64 : 258,636.05 = 60,136.66 : x
  2. Step 2: Convert to fraction form
    172,486.64/258,636.05 = 60,136.66/x
  3. Step 3: Cross multiply
    172,486.64x = 258,636.05 × 60,136.66
  4. Step 4: Simplify right side
    172,486.64x = 15,553,507,334.16
  5. Step 5: Solve for x
    x = 15,553,507,334.16/172,486.64
  6. Step 6: Final answer
    x = 90,172.24

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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.