Home / 129,986.40-194,979.60-84,885.60

Finding the Fourth Proportional to 129,986.40, 194,979.60 and 84,885.60

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Solution

The fourth proportional to 129,986.40, 194,979.60 and 84,885.60 is: 127,328.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,986.40 : 194,979.60 = 84,885.60 : x
  2. Step 2: Convert to fraction form
    129,986.40/194,979.60 = 84,885.60/x
  3. Step 3: Cross multiply
    129,986.40x = 194,979.60 × 84,885.60
  4. Step 4: Simplify right side
    129,986.40x = 16,550,960,333.76
  5. Step 5: Solve for x
    x = 16,550,960,333.76/129,986.40
  6. Step 6: Final answer
    x = 127,328.40

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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.