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Finding the Fourth Proportional to 229,429.81, 316,617.29 and 128,831.41

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Solution

The fourth proportional to 229,429.81, 316,617.29 and 128,831.41 is: 177,789.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,429.81 : 316,617.29 = 128,831.41 : x
  2. Step 2: Convert to fraction form
    229,429.81/316,617.29 = 128,831.41/x
  3. Step 3: Cross multiply
    229,429.81x = 316,617.29 × 128,831.41
  4. Step 4: Simplify right side
    229,429.81x = 40,790,251,901.08
  5. Step 5: Solve for x
    x = 40,790,251,901.08/229,429.81
  6. Step 6: Final answer
    x = 177,789.68

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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.