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Finding the Fourth Proportional to 66,808.20, 100,212.30 and 66,347.40

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Solution

The fourth proportional to 66,808.20, 100,212.30 and 66,347.40 is: 99,521.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,808.20 : 100,212.30 = 66,347.40 : x
  2. Step 2: Convert to fraction form
    66,808.20/100,212.30 = 66,347.40/x
  3. Step 3: Cross multiply
    66,808.20x = 100,212.30 × 66,347.40
  4. Step 4: Simplify right side
    66,808.20x = 6,648,825,553.02
  5. Step 5: Solve for x
    x = 6,648,825,553.02/66,808.20
  6. Step 6: Final answer
    x = 99,521.10

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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.