Home / 63,121.41-87,139.12-39,255.78

Finding the Fourth Proportional to 63,121.41, 87,139.12 and 39,255.78

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Solution

The fourth proportional to 63,121.41, 87,139.12 and 39,255.78 is: 54,192.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,121.41 : 87,139.12 = 39,255.78 : x
  2. Step 2: Convert to fraction form
    63,121.41/87,139.12 = 39,255.78/x
  3. Step 3: Cross multiply
    63,121.41x = 87,139.12 × 39,255.78
  4. Step 4: Simplify right side
    63,121.41x = 3,420,713,492.14
  5. Step 5: Solve for x
    x = 3,420,713,492.14/63,121.41
  6. Step 6: Final answer
    x = 54,192.60

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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.