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Finding the Fourth Proportional to 113,319,261.20, 169,978,891.80 and 72,504,592.40

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Solution

The fourth proportional to 113,319,261.20, 169,978,891.80 and 72,504,592.40 is: 108,756,888.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,319,261.20 : 169,978,891.80 = 72,504,592.40 : x
  2. Step 2: Convert to fraction form
    113,319,261.20/169,978,891.80 = 72,504,592.40/x
  3. Step 3: Cross multiply
    113,319,261.20x = 169,978,891.80 × 72,504,592.40
  4. Step 4: Simplify right side
    113,319,261.20x = 12,324,250,266,562,704
  5. Step 5: Solve for x
    x = 12,324,250,266,562,704/113,319,261.20
  6. Step 6: Final answer
    x = 108,756,888.60

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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.