Home / 105,664.46-145,831.90-65,391.19

Finding the Fourth Proportional to 105,664.46, 145,831.90 and 65,391.19

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Solution

The fourth proportional to 105,664.46, 145,831.90 and 65,391.19 is: 90,249.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,664.46 : 145,831.90 = 65,391.19 : x
  2. Step 2: Convert to fraction form
    105,664.46/145,831.90 = 65,391.19/x
  3. Step 3: Cross multiply
    105,664.46x = 145,831.90 × 65,391.19
  4. Step 4: Simplify right side
    105,664.46x = 9,536,121,480.96
  5. Step 5: Solve for x
    x = 9,536,121,480.96/105,664.46
  6. Step 6: Final answer
    x = 90,249.09

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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.