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Finding the Fourth Proportional to 66,429,464.80, 99,644,197.20 and 55,679,922.40

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Solution

The fourth proportional to 66,429,464.80, 99,644,197.20 and 55,679,922.40 is: 83,519,883.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429,464.80 : 99,644,197.20 = 55,679,922.40 : x
  2. Step 2: Convert to fraction form
    66,429,464.80/99,644,197.20 = 55,679,922.40/x
  3. Step 3: Cross multiply
    66,429,464.80x = 99,644,197.20 × 55,679,922.40
  4. Step 4: Simplify right side
    66,429,464.80x = 5,548,181,167,706,297
  5. Step 5: Solve for x
    x = 5,548,181,167,706,297/66,429,464.80
  6. Step 6: Final answer
    x = 83,519,883.60

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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.