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Finding the Fourth Proportional to 99,794,889.60, 149,692,334.40 and 72,921,033.60

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Solution

The fourth proportional to 99,794,889.60, 149,692,334.40 and 72,921,033.60 is: 109,381,550.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,794,889.60 : 149,692,334.40 = 72,921,033.60 : x
  2. Step 2: Convert to fraction form
    99,794,889.60/149,692,334.40 = 72,921,033.60/x
  3. Step 3: Cross multiply
    99,794,889.60x = 149,692,334.40 × 72,921,033.60
  4. Step 4: Simplify right side
    99,794,889.60x = 10,915,719,746,444,836
  5. Step 5: Solve for x
    x = 10,915,719,746,444,836/99,794,889.60
  6. Step 6: Final answer
    x = 109,381,550.40

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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.