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Finding the Fourth Proportional to 132,128, 182,336.64 and 79,136

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Solution

The fourth proportional to 132,128, 182,336.64 and 79,136 is: 109,207.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,128 : 182,336.64 = 79,136 : x
  2. Step 2: Convert to fraction form
    132,128/182,336.64 = 79,136/x
  3. Step 3: Cross multiply
    132,128x = 182,336.64 × 79,136
  4. Step 4: Simplify right side
    132,128x = 14,429,392,343.04
  5. Step 5: Solve for x
    x = 14,429,392,343.04/132,128
  6. Step 6: Final answer
    x = 109,207.68

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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.