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Finding the Fourth Proportional to 99,775.76, 137,684.97 and 56,749.41

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Solution

The fourth proportional to 99,775.76, 137,684.97 and 56,749.41 is: 78,311.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,775.76 : 137,684.97 = 56,749.41 : x
  2. Step 2: Convert to fraction form
    99,775.76/137,684.97 = 56,749.41/x
  3. Step 3: Cross multiply
    99,775.76x = 137,684.97 × 56,749.41
  4. Step 4: Simplify right side
    99,775.76x = 7,813,540,813.37
  5. Step 5: Solve for x
    x = 7,813,540,813.37/99,775.76
  6. Step 6: Final answer
    x = 78,311.02

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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.