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Finding the Fourth Proportional to 137,169.76, 189,303.12 and 76,745.92

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Solution

The fourth proportional to 137,169.76, 189,303.12 and 76,745.92 is: 105,914.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,169.76 : 189,303.12 = 76,745.92 : x
  2. Step 2: Convert to fraction form
    137,169.76/189,303.12 = 76,745.92/x
  3. Step 3: Cross multiply
    137,169.76x = 189,303.12 × 76,745.92
  4. Step 4: Simplify right side
    137,169.76x = 14,528,242,103.27
  5. Step 5: Solve for x
    x = 14,528,242,103.27/137,169.76
  6. Step 6: Final answer
    x = 105,914.32

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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.