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Finding the Fourth Proportional to 356,653.56, 535,013.28 and 129,006.12

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Solution

The fourth proportional to 356,653.56, 535,013.28 and 129,006.12 is: 193,521.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,653.56 : 535,013.28 = 129,006.12 : x
  2. Step 2: Convert to fraction form
    356,653.56/535,013.28 = 129,006.12/x
  3. Step 3: Cross multiply
    356,653.56x = 535,013.28 × 129,006.12
  4. Step 4: Simplify right side
    356,653.56x = 69,019,987,401.27
  5. Step 5: Solve for x
    x = 69,019,987,401.27/356,653.56
  6. Step 6: Final answer
    x = 193,521.09

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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.