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Finding the Fourth Proportional to 171,831.40, 257,751.42 and 66,673.96

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Solution

The fourth proportional to 171,831.40, 257,751.42 and 66,673.96 is: 100,012.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,831.40 : 257,751.42 = 66,673.96 : x
  2. Step 2: Convert to fraction form
    171,831.40/257,751.42 = 66,673.96/x
  3. Step 3: Cross multiply
    171,831.40x = 257,751.42 × 66,673.96
  4. Step 4: Simplify right side
    171,831.40x = 17,185,307,867.02
  5. Step 5: Solve for x
    x = 17,185,307,867.02/171,831.40
  6. Step 6: Final answer
    x = 100,012.62

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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.