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Finding the Fourth Proportional to 28,979,668.60, 43,469,502.90 and 19,424,519.80

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Solution

The fourth proportional to 28,979,668.60, 43,469,502.90 and 19,424,519.80 is: 29,136,779.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979,668.60 : 43,469,502.90 = 19,424,519.80 : x
  2. Step 2: Convert to fraction form
    28,979,668.60/43,469,502.90 = 19,424,519.80/x
  3. Step 3: Cross multiply
    28,979,668.60x = 43,469,502.90 × 19,424,519.80
  4. Step 4: Simplify right side
    28,979,668.60x = 844,374,219,777,207.38
  5. Step 5: Solve for x
    x = 844,374,219,777,207.38/28,979,668.60
  6. Step 6: Final answer
    x = 29,136,779.70

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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.