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Finding the Fourth Proportional to 99,650.94, 137,523.77 and 57,212.21

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Solution

The fourth proportional to 99,650.94, 137,523.77 and 57,212.21 is: 78,955.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,650.94 : 137,523.77 = 57,212.21 : x
  2. Step 2: Convert to fraction form
    99,650.94/137,523.77 = 57,212.21/x
  3. Step 3: Cross multiply
    99,650.94x = 137,523.77 × 57,212.21
  4. Step 4: Simplify right side
    99,650.94x = 7,868,037,835.55
  5. Step 5: Solve for x
    x = 7,868,037,835.55/99,650.94
  6. Step 6: Final answer
    x = 78,955.98

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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.