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Finding the Fourth Proportional to 90,846.90, 136,270.35 and 65,769.30

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Solution

The fourth proportional to 90,846.90, 136,270.35 and 65,769.30 is: 98,653.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,846.90 : 136,270.35 = 65,769.30 : x
  2. Step 2: Convert to fraction form
    90,846.90/136,270.35 = 65,769.30/x
  3. Step 3: Cross multiply
    90,846.90x = 136,270.35 × 65,769.30
  4. Step 4: Simplify right side
    90,846.90x = 8,962,405,530.26
  5. Step 5: Solve for x
    x = 8,962,405,530.26/90,846.90
  6. Step 6: Final answer
    x = 98,653.95

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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.