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Finding the Fourth Proportional to 66,757,403.70, 100,136,105.55 and 40,929,371.10

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Solution

The fourth proportional to 66,757,403.70, 100,136,105.55 and 40,929,371.10 is: 61,394,056.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,757,403.70 : 100,136,105.55 = 40,929,371.10 : x
  2. Step 2: Convert to fraction form
    66,757,403.70/100,136,105.55 = 40,929,371.10/x
  3. Step 3: Cross multiply
    66,757,403.70x = 100,136,105.55 × 40,929,371.10
  4. Step 4: Simplify right side
    66,757,403.70x = 4,098,507,824,564,719.50
  5. Step 5: Solve for x
    x = 4,098,507,824,564,719.50/66,757,403.70
  6. Step 6: Final answer
    x = 61,394,056.65

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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.