Home / 90,865.14-136,310.67-28,540.50

Finding the Fourth Proportional to 90,865.14, 136,310.67 and 28,540.50

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Solution

The fourth proportional to 90,865.14, 136,310.67 and 28,540.50 is: 42,814.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,865.14 : 136,310.67 = 28,540.50 : x
  2. Step 2: Convert to fraction form
    90,865.14/136,310.67 = 28,540.50/x
  3. Step 3: Cross multiply
    90,865.14x = 136,310.67 × 28,540.50
  4. Step 4: Simplify right side
    90,865.14x = 3,890,374,677.14
  5. Step 5: Solve for x
    x = 3,890,374,677.14/90,865.14
  6. Step 6: Final answer
    x = 42,814.82

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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.