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Finding the Fourth Proportional to 129,881.64, 194,665.70 and 63,221.88

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Solution

The fourth proportional to 129,881.64, 194,665.70 and 63,221.88 is: 94,756.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,881.64 : 194,665.70 = 63,221.88 : x
  2. Step 2: Convert to fraction form
    129,881.64/194,665.70 = 63,221.88/x
  3. Step 3: Cross multiply
    129,881.64x = 194,665.70 × 63,221.88
  4. Step 4: Simplify right side
    129,881.64x = 12,307,131,525.52
  5. Step 5: Solve for x
    x = 12,307,131,525.52/129,881.64
  6. Step 6: Final answer
    x = 94,756.51

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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.