Home / 103,827.10-155,412.60-81,519.70

Finding the Fourth Proportional to 103,827.10, 155,412.60 and 81,519.70

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Solution

The fourth proportional to 103,827.10, 155,412.60 and 81,519.70 is: 122,021.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,827.10 : 155,412.60 = 81,519.70 : x
  2. Step 2: Convert to fraction form
    103,827.10/155,412.60 = 81,519.70/x
  3. Step 3: Cross multiply
    103,827.10x = 155,412.60 × 81,519.70
  4. Step 4: Simplify right side
    103,827.10x = 12,669,188,528.22
  5. Step 5: Solve for x
    x = 12,669,188,528.22/103,827.10
  6. Step 6: Final answer
    x = 122,021.98

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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.