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Finding the Fourth Proportional to 90,893.70, 136,206.90 and 65,986.20

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Solution

The fourth proportional to 90,893.70, 136,206.90 and 65,986.20 is: 98,882.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,893.70 : 136,206.90 = 65,986.20 : x
  2. Step 2: Convert to fraction form
    90,893.70/136,206.90 = 65,986.20/x
  3. Step 3: Cross multiply
    90,893.70x = 136,206.90 × 65,986.20
  4. Step 4: Simplify right side
    90,893.70x = 8,987,775,744.78
  5. Step 5: Solve for x
    x = 8,987,775,744.78/90,893.70
  6. Step 6: Final answer
    x = 98,882.27

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1.5x scale

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.