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Finding the Fourth Proportional to 70,514,613.60, 105,765,699.60 and 19,392,079.20

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Solution

The fourth proportional to 70,514,613.60, 105,765,699.60 and 19,392,079.20 is: 29,086,408.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,514,613.60 : 105,765,699.60 = 19,392,079.20 : x
  2. Step 2: Convert to fraction form
    70,514,613.60/105,765,699.60 = 19,392,079.20/x
  3. Step 3: Cross multiply
    70,514,613.60x = 105,765,699.60 × 19,392,079.20
  4. Step 4: Simplify right side
    70,514,613.60x = 2,051,016,823,286,608.25
  5. Step 5: Solve for x
    x = 2,051,016,823,286,608.25/70,514,613.60
  6. Step 6: Final answer
    x = 29,086,408.03

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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.