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Finding the Fourth Proportional to 66,823.40, 100,235.10 and 20,070.20

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Solution

The fourth proportional to 66,823.40, 100,235.10 and 20,070.20 is: 30,105.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,823.40 : 100,235.10 = 20,070.20 : x
  2. Step 2: Convert to fraction form
    66,823.40/100,235.10 = 20,070.20/x
  3. Step 3: Cross multiply
    66,823.40x = 100,235.10 × 20,070.20
  4. Step 4: Simplify right side
    66,823.40x = 2,011,738,504.02
  5. Step 5: Solve for x
    x = 2,011,738,504.02/66,823.40
  6. Step 6: Final answer
    x = 30,105.30

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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.