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Finding the Fourth Proportional to 66,145,489.60, 99,218,234.40 and 47,863,919.20

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Solution

The fourth proportional to 66,145,489.60, 99,218,234.40 and 47,863,919.20 is: 71,795,878.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,145,489.60 : 99,218,234.40 = 47,863,919.20 : x
  2. Step 2: Convert to fraction form
    66,145,489.60/99,218,234.40 = 47,863,919.20/x
  3. Step 3: Cross multiply
    66,145,489.60x = 99,218,234.40 × 47,863,919.20
  4. Step 4: Simplify right side
    66,145,489.60x = 4,748,973,554,488,261
  5. Step 5: Solve for x
    x = 4,748,973,554,488,261/66,145,489.60
  6. Step 6: Final answer
    x = 71,795,878.80

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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.