Home / 103,639.85-155,459.78-71,983.03

Finding the Fourth Proportional to 103,639.85, 155,459.78 and 71,983.03

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Solution

The fourth proportional to 103,639.85, 155,459.78 and 71,983.03 is: 107,974.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639.85 : 155,459.78 = 71,983.03 : x
  2. Step 2: Convert to fraction form
    103,639.85/155,459.78 = 71,983.03/x
  3. Step 3: Cross multiply
    103,639.85x = 155,459.78 × 71,983.03
  4. Step 4: Simplify right side
    103,639.85x = 11,190,466,007.53
  5. Step 5: Solve for x
    x = 11,190,466,007.53/103,639.85
  6. Step 6: Final answer
    x = 107,974.55

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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.