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Finding the Fourth Proportional to 132,981.80, 183,489.78 and 79,271.84

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Solution

The fourth proportional to 132,981.80, 183,489.78 and 79,271.84 is: 109,380.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,981.80 : 183,489.78 = 79,271.84 : x
  2. Step 2: Convert to fraction form
    132,981.80/183,489.78 = 79,271.84/x
  3. Step 3: Cross multiply
    132,981.80x = 183,489.78 × 79,271.84
  4. Step 4: Simplify right side
    132,981.80x = 14,545,572,481.80
  5. Step 5: Solve for x
    x = 14,545,572,481.80/132,981.80
  6. Step 6: Final answer
    x = 109,380.17

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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.