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Finding the Fourth Proportional to 356,728.38, 535,174.92 and 120,065.28

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Solution

The fourth proportional to 356,728.38, 535,174.92 and 120,065.28 is: 180,125.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,728.38 : 535,174.92 = 120,065.28 : x
  2. Step 2: Convert to fraction form
    356,728.38/535,174.92 = 120,065.28/x
  3. Step 3: Cross multiply
    356,728.38x = 535,174.92 × 120,065.28
  4. Step 4: Simplify right side
    356,728.38x = 64,255,926,618.78
  5. Step 5: Solve for x
    x = 64,255,926,618.78/356,728.38
  6. Step 6: Final answer
    x = 180,125.64

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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.