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Finding the Fourth Proportional to 71,897,853.60, 107,850,279.60 and 20,082,399.84

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Solution

The fourth proportional to 71,897,853.60, 107,850,279.60 and 20,082,399.84 is: 30,124,577.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,897,853.60 : 107,850,279.60 = 20,082,399.84 : x
  2. Step 2: Convert to fraction form
    71,897,853.60/107,850,279.60 = 20,082,399.84/x
  3. Step 3: Cross multiply
    71,897,853.60x = 107,850,279.60 × 20,082,399.84
  4. Step 4: Simplify right side
    71,897,853.60x = 2,165,892,437,782,995.25
  5. Step 5: Solve for x
    x = 2,165,892,437,782,995.25/71,897,853.60
  6. Step 6: Final answer
    x = 30,124,577.15

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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.