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Finding the Fourth Proportional to 71,779,229.60, 107,668,844.40 and 66,236,496.80

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Solution

The fourth proportional to 71,779,229.60, 107,668,844.40 and 66,236,496.80 is: 99,354,745.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,779,229.60 : 107,668,844.40 = 66,236,496.80 : x
  2. Step 2: Convert to fraction form
    71,779,229.60/107,668,844.40 = 66,236,496.80/x
  3. Step 3: Cross multiply
    71,779,229.60x = 107,668,844.40 × 66,236,496.80
  4. Step 4: Simplify right side
    71,779,229.60x = 7,131,607,067,560,298
  5. Step 5: Solve for x
    x = 7,131,607,067,560,298/71,779,229.60
  6. Step 6: Final answer
    x = 99,354,745.20

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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.