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Finding the Fourth Proportional to 90,997.70, 125,996.73 and 83,999.30

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Solution

The fourth proportional to 90,997.70, 125,996.73 and 83,999.30 is: 116,306.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,997.70 : 125,996.73 = 83,999.30 : x
  2. Step 2: Convert to fraction form
    90,997.70/125,996.73 = 83,999.30/x
  3. Step 3: Cross multiply
    90,997.70x = 125,996.73 × 83,999.30
  4. Step 4: Simplify right side
    90,997.70x = 10,583,637,122.29
  5. Step 5: Solve for x
    x = 10,583,637,122.29/90,997.70
  6. Step 6: Final answer
    x = 116,306.64

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1.5x scale

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.