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Finding the Fourth Proportional to 172,720.61, 259,090.19 and 54,401.21

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Solution

The fourth proportional to 172,720.61, 259,090.19 and 54,401.21 is: 81,604.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,720.61 : 259,090.19 = 54,401.21 : x
  2. Step 2: Convert to fraction form
    172,720.61/259,090.19 = 54,401.21/x
  3. Step 3: Cross multiply
    172,720.61x = 259,090.19 × 54,401.21
  4. Step 4: Simplify right side
    172,720.61x = 14,094,819,835.13
  5. Step 5: Solve for x
    x = 14,094,819,835.13/172,720.61
  6. Step 6: Final answer
    x = 81,604.74

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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.