Home / 129,828.36-194,740.52-66,612

Finding the Fourth Proportional to 129,828.36, 194,740.52 and 66,612

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Solution

The fourth proportional to 129,828.36, 194,740.52 and 66,612 is: 99,916.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,828.36 : 194,740.52 = 66,612 : x
  2. Step 2: Convert to fraction form
    129,828.36/194,740.52 = 66,612/x
  3. Step 3: Cross multiply
    129,828.36x = 194,740.52 × 66,612
  4. Step 4: Simplify right side
    129,828.36x = 12,972,055,185.18
  5. Step 5: Solve for x
    x = 12,972,055,185.18/129,828.36
  6. Step 6: Final answer
    x = 99,916.96

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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.