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Finding the Fourth Proportional to 129,784.40, 194,369.40 and 88,005.20

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Solution

The fourth proportional to 129,784.40, 194,369.40 and 88,005.20 is: 131,799.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,784.40 : 194,369.40 = 88,005.20 : x
  2. Step 2: Convert to fraction form
    129,784.40/194,369.40 = 88,005.20/x
  3. Step 3: Cross multiply
    129,784.40x = 194,369.40 × 88,005.20
  4. Step 4: Simplify right side
    129,784.40x = 17,105,517,920.88
  5. Step 5: Solve for x
    x = 17,105,517,920.88/129,784.40
  6. Step 6: Final answer
    x = 131,799.49

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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.