Home / 103,631.85-155,447.78-91,384.65

Finding the Fourth Proportional to 103,631.85, 155,447.78 and 91,384.65

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Solution

The fourth proportional to 103,631.85, 155,447.78 and 91,384.65 is: 137,076.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,631.85 : 155,447.78 = 91,384.65 : x
  2. Step 2: Convert to fraction form
    103,631.85/155,447.78 = 91,384.65/x
  3. Step 3: Cross multiply
    103,631.85x = 155,447.78 × 91,384.65
  4. Step 4: Simplify right side
    103,631.85x = 14,205,540,511.65
  5. Step 5: Solve for x
    x = 14,205,540,511.65/103,631.85
  6. Step 6: Final answer
    x = 137,076.98

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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.