Home / 105,704.20-145,878.54-69,831.28

Finding the Fourth Proportional to 105,704.20, 145,878.54 and 69,831.28

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Solution

The fourth proportional to 105,704.20, 145,878.54 and 69,831.28 is: 96,371.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,704.20 : 145,878.54 = 69,831.28 : x
  2. Step 2: Convert to fraction form
    105,704.20/145,878.54 = 69,831.28/x
  3. Step 3: Cross multiply
    105,704.20x = 145,878.54 × 69,831.28
  4. Step 4: Simplify right side
    105,704.20x = 10,186,885,172.73
  5. Step 5: Solve for x
    x = 10,186,885,172.73/105,704.20
  6. Step 6: Final answer
    x = 96,371.62

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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.