Home / 103,628.35-155,442.53-91,381.15

Finding the Fourth Proportional to 103,628.35, 155,442.53 and 91,381.15

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Solution

The fourth proportional to 103,628.35, 155,442.53 and 91,381.15 is: 137,071.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,628.35 : 155,442.53 = 91,381.15 : x
  2. Step 2: Convert to fraction form
    103,628.35/155,442.53 = 91,381.15/x
  3. Step 3: Cross multiply
    103,628.35x = 155,442.53 × 91,381.15
  4. Step 4: Simplify right side
    103,628.35x = 14,204,517,150.31
  5. Step 5: Solve for x
    x = 14,204,517,150.31/103,628.35
  6. Step 6: Final answer
    x = 137,071.73

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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.