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Finding the Fourth Proportional to 66,872,877.20, 100,308,877.08 and 18,346,935.44

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Solution

The fourth proportional to 66,872,877.20, 100,308,877.08 and 18,346,935.44 is: 27,520,282.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,872,877.20 : 100,308,877.08 = 18,346,935.44 : x
  2. Step 2: Convert to fraction form
    66,872,877.20/100,308,877.08 = 18,346,935.44/x
  3. Step 3: Cross multiply
    66,872,877.20x = 100,308,877.08 × 18,346,935.44
  4. Step 4: Simplify right side
    66,872,877.20x = 1,840,360,491,845,655.75
  5. Step 5: Solve for x
    x = 1,840,360,491,845,655.75/66,872,877.20
  6. Step 6: Final answer
    x = 27,520,282.79

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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.