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Finding the Fourth Proportional to 117,447,626.40, 176,171,439.60 and 81,167,920.80

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Solution

The fourth proportional to 117,447,626.40, 176,171,439.60 and 81,167,920.80 is: 121,751,881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,447,626.40 : 176,171,439.60 = 81,167,920.80 : x
  2. Step 2: Convert to fraction form
    117,447,626.40/176,171,439.60 = 81,167,920.80/x
  3. Step 3: Cross multiply
    117,447,626.40x = 176,171,439.60 × 81,167,920.80
  4. Step 4: Simplify right side
    117,447,626.40x = 14,299,469,456,674,782
  5. Step 5: Solve for x
    x = 14,299,469,456,674,782/117,447,626.40
  6. Step 6: Final answer
    x = 121,751,881.20

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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.