Home / 68,531.20-102,748.20-31,109.20

Finding the Fourth Proportional to 68,531.20, 102,748.20 and 31,109.20

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Solution

The fourth proportional to 68,531.20, 102,748.20 and 31,109.20 is: 46,641.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,531.20 : 102,748.20 = 31,109.20 : x
  2. Step 2: Convert to fraction form
    68,531.20/102,748.20 = 31,109.20/x
  3. Step 3: Cross multiply
    68,531.20x = 102,748.20 × 31,109.20
  4. Step 4: Simplify right side
    68,531.20x = 3,196,414,303.44
  5. Step 5: Solve for x
    x = 3,196,414,303.44/68,531.20
  6. Step 6: Final answer
    x = 46,641.74

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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.