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Finding the Fourth Proportional to 172,135.60, 258,104.06 and 66,831.54

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Solution

The fourth proportional to 172,135.60, 258,104.06 and 66,831.54 is: 100,208.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,135.60 : 258,104.06 = 66,831.54 : x
  2. Step 2: Convert to fraction form
    172,135.60/258,104.06 = 66,831.54/x
  3. Step 3: Cross multiply
    172,135.60x = 258,104.06 × 66,831.54
  4. Step 4: Simplify right side
    172,135.60x = 17,249,491,810.05
  5. Step 5: Solve for x
    x = 17,249,491,810.05/172,135.60
  6. Step 6: Final answer
    x = 100,208.74

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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.