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Finding the Fourth Proportional to 164,831.60, 247,765.80 and 161,721.20

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Solution

The fourth proportional to 164,831.60, 247,765.80 and 161,721.20 is: 243,090.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,831.60 : 247,765.80 = 161,721.20 : x
  2. Step 2: Convert to fraction form
    164,831.60/247,765.80 = 161,721.20/x
  3. Step 3: Cross multiply
    164,831.60x = 247,765.80 × 161,721.20
  4. Step 4: Simplify right side
    164,831.60x = 40,068,982,494.96
  5. Step 5: Solve for x
    x = 40,068,982,494.96/164,831.60
  6. Step 6: Final answer
    x = 243,090.42

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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.