Home / 103,827.20-143,193.28-87,772.80

Finding the Fourth Proportional to 103,827.20, 143,193.28 and 87,772.80

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Solution

The fourth proportional to 103,827.20, 143,193.28 and 87,772.80 is: 121,051.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,827.20 : 143,193.28 = 87,772.80 : x
  2. Step 2: Convert to fraction form
    103,827.20/143,193.28 = 87,772.80/x
  3. Step 3: Cross multiply
    103,827.20x = 143,193.28 × 87,772.80
  4. Step 4: Simplify right side
    103,827.20x = 12,568,475,126.78
  5. Step 5: Solve for x
    x = 12,568,475,126.78/103,827.20
  6. Step 6: Final answer
    x = 121,051.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.