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Finding the Fourth Proportional to 66,440,431.60, 99,660,647.40 and 42,100,433.80

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Solution

The fourth proportional to 66,440,431.60, 99,660,647.40 and 42,100,433.80 is: 63,150,650.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,440,431.60 : 99,660,647.40 = 42,100,433.80 : x
  2. Step 2: Convert to fraction form
    66,440,431.60/99,660,647.40 = 42,100,433.80/x
  3. Step 3: Cross multiply
    66,440,431.60x = 99,660,647.40 × 42,100,433.80
  4. Step 4: Simplify right side
    66,440,431.60x = 4,195,756,488,328,842
  5. Step 5: Solve for x
    x = 4,195,756,488,328,842/66,440,431.60
  6. Step 6: Final answer
    x = 63,150,650.70

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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.