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Finding the Fourth Proportional to 66,893,609.60, 100,340,414.40 and 21,459,996.80

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Solution

The fourth proportional to 66,893,609.60, 100,340,414.40 and 21,459,996.80 is: 32,189,995.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,893,609.60 : 100,340,414.40 = 21,459,996.80 : x
  2. Step 2: Convert to fraction form
    66,893,609.60/100,340,414.40 = 21,459,996.80/x
  3. Step 3: Cross multiply
    66,893,609.60x = 100,340,414.40 × 21,459,996.80
  4. Step 4: Simplify right side
    66,893,609.60x = 2,153,304,971,934,674
  5. Step 5: Solve for x
    x = 2,153,304,971,934,674/66,893,609.60
  6. Step 6: Final answer
    x = 32,189,995.20

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Similar ratio
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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.