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Finding the Fourth Proportional to 129,964.40, 194,639.40 and 88,185.20

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Solution

The fourth proportional to 129,964.40, 194,639.40 and 88,185.20 is: 132,069.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,964.40 : 194,639.40 = 88,185.20 : x
  2. Step 2: Convert to fraction form
    129,964.40/194,639.40 = 88,185.20/x
  3. Step 3: Cross multiply
    129,964.40x = 194,639.40 × 88,185.20
  4. Step 4: Simplify right side
    129,964.40x = 17,164,314,416.88
  5. Step 5: Solve for x
    x = 17,164,314,416.88/129,964.40
  6. Step 6: Final answer
    x = 132,069.35

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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.