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Finding the Fourth Proportional to 129,940.58, 194,988.63 and 56,068.58

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Solution

The fourth proportional to 129,940.58, 194,988.63 and 56,068.58 is: 84,136.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,940.58 : 194,988.63 = 56,068.58 : x
  2. Step 2: Convert to fraction form
    129,940.58/194,988.63 = 56,068.58/x
  3. Step 3: Cross multiply
    129,940.58x = 194,988.63 × 56,068.58
  4. Step 4: Simplify right side
    129,940.58x = 10,932,735,216.34
  5. Step 5: Solve for x
    x = 10,932,735,216.34/129,940.58
  6. Step 6: Final answer
    x = 84,136.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.