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Finding the Fourth Proportional to 99,745.32, 137,638.98 and 55,030.44

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Solution

The fourth proportional to 99,745.32, 137,638.98 and 55,030.44 is: 75,936.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,745.32 : 137,638.98 = 55,030.44 : x
  2. Step 2: Convert to fraction form
    99,745.32/137,638.98 = 55,030.44/x
  3. Step 3: Cross multiply
    99,745.32x = 137,638.98 × 55,030.44
  4. Step 4: Simplify right side
    99,745.32x = 7,574,333,630.55
  5. Step 5: Solve for x
    x = 7,574,333,630.55/99,745.32
  6. Step 6: Final answer
    x = 75,936.73

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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.