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Finding the Fourth Proportional to 91,863.81, 137,831.49 and 74,258.46

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Solution

The fourth proportional to 91,863.81, 137,831.49 and 74,258.46 is: 111,416.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,863.81 : 137,831.49 = 74,258.46 : x
  2. Step 2: Convert to fraction form
    91,863.81/137,831.49 = 74,258.46/x
  3. Step 3: Cross multiply
    91,863.81x = 137,831.49 × 74,258.46
  4. Step 4: Simplify right side
    91,863.81x = 10,235,154,186.91
  5. Step 5: Solve for x
    x = 10,235,154,186.91/91,863.81
  6. Step 6: Final answer
    x = 111,416.61

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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.