Home / 103,629.10-155,443.65-91,381.90

Finding the Fourth Proportional to 103,629.10, 155,443.65 and 91,381.90

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Solution

The fourth proportional to 103,629.10, 155,443.65 and 91,381.90 is: 137,072.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,629.10 : 155,443.65 = 91,381.90 : x
  2. Step 2: Convert to fraction form
    103,629.10/155,443.65 = 91,381.90/x
  3. Step 3: Cross multiply
    103,629.10x = 155,443.65 × 91,381.90
  4. Step 4: Simplify right side
    103,629.10x = 14,204,736,079.94
  5. Step 5: Solve for x
    x = 14,204,736,079.94/103,629.10
  6. Step 6: Final answer
    x = 137,072.85

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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.