Home / 135,137.76-186,513.30-78,582

Finding the Fourth Proportional to 135,137.76, 186,513.30 and 78,582

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Solution

The fourth proportional to 135,137.76, 186,513.30 and 78,582 is: 108,456.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,137.76 : 186,513.30 = 78,582 : x
  2. Step 2: Convert to fraction form
    135,137.76/186,513.30 = 78,582/x
  3. Step 3: Cross multiply
    135,137.76x = 186,513.30 × 78,582
  4. Step 4: Simplify right side
    135,137.76x = 14,656,588,140.60
  5. Step 5: Solve for x
    x = 14,656,588,140.60/135,137.76
  6. Step 6: Final answer
    x = 108,456.65

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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.