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Finding the Fourth Proportional to 91,786.68, 137,686.86 and 35,672.76

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Solution

The fourth proportional to 91,786.68, 137,686.86 and 35,672.76 is: 53,511.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,786.68 : 137,686.86 = 35,672.76 : x
  2. Step 2: Convert to fraction form
    91,786.68/137,686.86 = 35,672.76/x
  3. Step 3: Cross multiply
    91,786.68x = 137,686.86 × 35,672.76
  4. Step 4: Simplify right side
    91,786.68x = 4,911,670,311.93
  5. Step 5: Solve for x
    x = 4,911,670,311.93/91,786.68
  6. Step 6: Final answer
    x = 53,511.80

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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.