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Finding the Fourth Proportional to 91,054,449.90, 136,581,674.85 and 81,488,511.90

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Solution

The fourth proportional to 91,054,449.90, 136,581,674.85 and 81,488,511.90 is: 122,232,767.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,054,449.90 : 136,581,674.85 = 81,488,511.90 : x
  2. Step 2: Convert to fraction form
    91,054,449.90/136,581,674.85 = 81,488,511.90/x
  3. Step 3: Cross multiply
    91,054,449.90x = 136,581,674.85 × 81,488,511.90
  4. Step 4: Simplify right side
    91,054,449.90x = 11,129,837,436,336,156
  5. Step 5: Solve for x
    x = 11,129,837,436,336,156/91,054,449.90
  6. Step 6: Final answer
    x = 122,232,767.85

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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.