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Finding the Fourth Proportional to 66,898.80, 100,348.20 and 63,618.30

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Solution

The fourth proportional to 66,898.80, 100,348.20 and 63,618.30 is: 95,427.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,898.80 : 100,348.20 = 63,618.30 : x
  2. Step 2: Convert to fraction form
    66,898.80/100,348.20 = 63,618.30/x
  3. Step 3: Cross multiply
    66,898.80x = 100,348.20 × 63,618.30
  4. Step 4: Simplify right side
    66,898.80x = 6,383,981,892.06
  5. Step 5: Solve for x
    x = 6,383,981,892.06/66,898.80
  6. Step 6: Final answer
    x = 95,427.45

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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.