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Finding the Fourth Proportional to 131,073.66, 180,879.48 and 72,928.22

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Solution

The fourth proportional to 131,073.66, 180,879.48 and 72,928.22 is: 100,639.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,073.66 : 180,879.48 = 72,928.22 : x
  2. Step 2: Convert to fraction form
    131,073.66/180,879.48 = 72,928.22/x
  3. Step 3: Cross multiply
    131,073.66x = 180,879.48 × 72,928.22
  4. Step 4: Simplify right side
    131,073.66x = 13,191,217,606.53
  5. Step 5: Solve for x
    x = 13,191,217,606.53/131,073.66
  6. Step 6: Final answer
    x = 100,639.73

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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.