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Finding the Fourth Proportional to 356,647.56, 535,004.28 and 129,000.12

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Solution

The fourth proportional to 356,647.56, 535,004.28 and 129,000.12 is: 193,512.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,647.56 : 535,004.28 = 129,000.12 : x
  2. Step 2: Convert to fraction form
    356,647.56/535,004.28 = 129,000.12/x
  3. Step 3: Cross multiply
    356,647.56x = 535,004.28 × 129,000.12
  4. Step 4: Simplify right side
    356,647.56x = 69,015,616,320.51
  5. Step 5: Solve for x
    x = 69,015,616,320.51/356,647.56
  6. Step 6: Final answer
    x = 193,512.09

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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.