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Finding the Fourth Proportional to 90,843, 136,265.72 and 28,513.50

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Solution

The fourth proportional to 90,843, 136,265.72 and 28,513.50 is: 42,770.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,843 : 136,265.72 = 28,513.50 : x
  2. Step 2: Convert to fraction form
    90,843/136,265.72 = 28,513.50/x
  3. Step 3: Cross multiply
    90,843x = 136,265.72 × 28,513.50
  4. Step 4: Simplify right side
    90,843x = 3,885,412,464.65
  5. Step 5: Solve for x
    x = 3,885,412,464.65/90,843
  6. Step 6: Final answer
    x = 42,770.63

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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.