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Finding the Fourth Proportional to 132,919.86, 183,428.70 and 72,489.42

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Solution

The fourth proportional to 132,919.86, 183,428.70 and 72,489.42 is: 100,035.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,919.86 : 183,428.70 = 72,489.42 : x
  2. Step 2: Convert to fraction form
    132,919.86/183,428.70 = 72,489.42/x
  3. Step 3: Cross multiply
    132,919.86x = 183,428.70 × 72,489.42
  4. Step 4: Simplify right side
    132,919.86x = 13,296,640,074.35
  5. Step 5: Solve for x
    x = 13,296,640,074.35/132,919.86
  6. Step 6: Final answer
    x = 100,035.01

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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.