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Finding the Fourth Proportional to 171,938.60, 257,831.10 and 66,722.60

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Solution

The fourth proportional to 171,938.60, 257,831.10 and 66,722.60 is: 100,054.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,938.60 : 257,831.10 = 66,722.60 : x
  2. Step 2: Convert to fraction form
    171,938.60/257,831.10 = 66,722.60/x
  3. Step 3: Cross multiply
    171,938.60x = 257,831.10 × 66,722.60
  4. Step 4: Simplify right side
    171,938.60x = 17,203,161,352.86
  5. Step 5: Solve for x
    x = 17,203,161,352.86/171,938.60
  6. Step 6: Final answer
    x = 100,054.10

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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.