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Finding the Fourth Proportional to 172,143.28, 258,109.21 and 59,775.22

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Solution

The fourth proportional to 172,143.28, 258,109.21 and 59,775.22 is: 89,626.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,143.28 : 258,109.21 = 59,775.22 : x
  2. Step 2: Convert to fraction form
    172,143.28/258,109.21 = 59,775.22/x
  3. Step 3: Cross multiply
    172,143.28x = 258,109.21 × 59,775.22
  4. Step 4: Simplify right side
    172,143.28x = 15,428,534,811.78
  5. Step 5: Solve for x
    x = 15,428,534,811.78/172,143.28
  6. Step 6: Final answer
    x = 89,626.12

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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.