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Finding the Fourth Proportional to 172,341.57, 237,831.36 and 100,781.72

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Solution

The fourth proportional to 172,341.57, 237,831.36 and 100,781.72 is: 139,078.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,341.57 : 237,831.36 = 100,781.72 : x
  2. Step 2: Convert to fraction form
    172,341.57/237,831.36 = 100,781.72/x
  3. Step 3: Cross multiply
    172,341.57x = 237,831.36 × 100,781.72
  4. Step 4: Simplify right side
    172,341.57x = 23,969,052,341.58
  5. Step 5: Solve for x
    x = 23,969,052,341.58/172,341.57
  6. Step 6: Final answer
    x = 139,078.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.