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Finding the Fourth Proportional to 91,104.70, 136,445.64 and 87,950.98

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Solution

The fourth proportional to 91,104.70, 136,445.64 and 87,950.98 is: 131,722.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,104.70 : 136,445.64 = 87,950.98 : x
  2. Step 2: Convert to fraction form
    91,104.70/136,445.64 = 87,950.98/x
  3. Step 3: Cross multiply
    91,104.70x = 136,445.64 × 87,950.98
  4. Step 4: Simplify right side
    91,104.70x = 12,000,527,754.73
  5. Step 5: Solve for x
    x = 12,000,527,754.73/91,104.70
  6. Step 6: Final answer
    x = 131,722.38

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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.