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Finding the Fourth Proportional to 66,206.80, 99,310.20 and 45,211.60

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Solution

The fourth proportional to 66,206.80, 99,310.20 and 45,211.60 is: 67,817.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,206.80 : 99,310.20 = 45,211.60 : x
  2. Step 2: Convert to fraction form
    66,206.80/99,310.20 = 45,211.60/x
  3. Step 3: Cross multiply
    66,206.80x = 99,310.20 × 45,211.60
  4. Step 4: Simplify right side
    66,206.80x = 4,489,973,038.32
  5. Step 5: Solve for x
    x = 4,489,973,038.32/66,206.80
  6. Step 6: Final answer
    x = 67,817.40

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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.