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Finding the Fourth Proportional to 136,555,579.80, 204,833,369.70 and 90,639,077.40

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Solution

The fourth proportional to 136,555,579.80, 204,833,369.70 and 90,639,077.40 is: 135,958,616.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,555,579.80 : 204,833,369.70 = 90,639,077.40 : x
  2. Step 2: Convert to fraction form
    136,555,579.80/204,833,369.70 = 90,639,077.40/x
  3. Step 3: Cross multiply
    136,555,579.80x = 204,833,369.70 × 90,639,077.40
  4. Step 4: Simplify right side
    136,555,579.80x = 18,565,907,650,341,116
  5. Step 5: Solve for x
    x = 18,565,907,650,341,116/136,555,579.80
  6. Step 6: Final answer
    x = 135,958,616.10

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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.