Home / 45,431.60-68,139.30-28,761.80

Finding the Fourth Proportional to 45,431.60, 68,139.30 and 28,761.80

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Solution

The fourth proportional to 45,431.60, 68,139.30 and 28,761.80 is: 43,137.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,431.60 : 68,139.30 = 28,761.80 : x
  2. Step 2: Convert to fraction form
    45,431.60/68,139.30 = 28,761.80/x
  3. Step 3: Cross multiply
    45,431.60x = 68,139.30 × 28,761.80
  4. Step 4: Simplify right side
    45,431.60x = 1,959,808,918.74
  5. Step 5: Solve for x
    x = 1,959,808,918.74/45,431.60
  6. Step 6: Final answer
    x = 43,137.57

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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.