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Finding the Fourth Proportional to 136,793,906.96, 188,771,934.84 and 78,055,504.88

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Solution

The fourth proportional to 136,793,906.96, 188,771,934.84 and 78,055,504.88 is: 107,714,510.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,793,906.96 : 188,771,934.84 = 78,055,504.88 : x
  2. Step 2: Convert to fraction form
    136,793,906.96/188,771,934.84 = 78,055,504.88/x
  3. Step 3: Cross multiply
    136,793,906.96x = 188,771,934.84 × 78,055,504.88
  4. Step 4: Simplify right side
    136,793,906.96x = 14,734,688,681,110,662
  5. Step 5: Solve for x
    x = 14,734,688,681,110,662/136,793,906.96
  6. Step 6: Final answer
    x = 107,714,510.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.